The information in this preliminary prospectus supplement is not
complete and may be changed. This preliminary prospectus supplement and the accompanying prospectus are not an offer to sell these securities and are not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is not
permitted.

Subject to Completion

Preliminary Prospectus Supplement dated October 17, 2012

PRELIMINARY PROSPECTUS SUPPLEMENT

(To
Prospectus Dated February 16, 2012)

Owens Corning

$

% Senior Notes due

We are
offering $ aggregate principal amount of % Senior Notes due , which we refer to
in this prospectus supplement as the notes. Interest on the notes is payable semi-annually in arrears on and
each year, beginning on
, 2013. The notes will mature on
. We may redeem the notes at any time and from time to time prior to maturity, in whole or in part, for cash at the redemption
prices described in this prospectus supplement, plus accrued and unpaid interest to, but not including, the redemption date. See Description of the NotesOptional Redemption beginning on page S-20 of this prospectus supplement. If
we undergo a Change of Control Repurchase Event (as defined herein), holders may request us to repurchase the notes in whole or in part for cash at a price equal to 101% of the principal amount of the notes to be purchased, plus any accrued and
unpaid interest to, but excluding, the repurchase date. See Description of the NotesChange of Control beginning on page S-21 of this prospectus supplement. Notes will be issued only in denominations of $2,000 and integral multiples
of $1,000 in excess of $2,000.

We intend to use a portion of the net proceeds from the sale of the notes offered hereby for
the purchase of outstanding debt securities that are tendered pursuant to the Offer to Purchase for cash, dated October 17, 2012, setting forth the terms of our tender offers for certain of our outstanding debt securities. See Prospectus
Supplement SummaryTender Offers beginning on page S-5 for a description of the tender offers. The remaining net proceeds will be used (i) first, to repay outstanding borrowings under our $800 million revolving credit facility and
(ii) second, for general corporate purposes. This offering is not conditioned upon the successful completion of either of the tender offers.

The notes will be our senior unsecured obligations and will rank equally in right of payment with our other existing and future senior unsecured indebtedness. The notes will be effectively subordinated to
our existing and future secured indebtedness to the extent of the assets securing that indebtedness. The notes will be fully and unconditionally guaranteed by each of our current and future domestic subsidiaries that is a borrower or guarantor under
our Credit Agreement (as defined herein). The guarantees will be unsecured and will rank equally in right of payment with all other existing and future senior unsecured indebtedness of the guarantors. The guarantees will be effectively subordinated
to existing and future secured debt of the guarantors to the extent of the assets securing that indebtedness.

The notes are a
new issue of securities with no established trading market. We do not intend to list the notes on any securities exchange or include the notes in any automated quotation system.

Investing in the notes involves risks. See the section titled Risk Factors beginning on page
S-11 of this prospectus supplement for a discussion of certain of the risks you should consider before investing in the notes.

Per Note

Total

Public offering price (1)

%

$

Underwriting discount

%

$

Proceeds, before expenses, to Owens Corning

%

$

(1)

Plus accrued interest from October , 2012, if settlement occurs after that date.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or
determined if this prospectus supplement or the accompanying prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

We expect that the notes will be ready for delivery to investors in book-entry form through The Depository Trust Company and its participants (including Euroclear Bank, S.A./N.V. and Clearstream Banking,
societé anonyme) on or about October , 2012.

This prospectus supplement incorporates by reference important business and financial information about us that is not included in or
delivered with this document. This information, other than exhibits to documents that are not specifically incorporated by reference in this prospectus supplement, is available to you without charge upon written or oral request to Owens Corning at
the address or telephone number indicated in the section titled Where You Can Find More Information in this prospectus supplement.

This document is in two parts. The first part is this prospectus supplement, which describes the specific terms of the offering of the notes. The second part is the accompanying prospectus dated
February 16, 2012, which we refer to as the accompanying prospectus. The accompanying prospectus gives more general information about us and the debt securities we may issue from time to time, some of which may not apply to the
notes.

You should rely only on the information contained in this prospectus supplement and the accompanying prospectus,
including the information incorporated or deemed to be incorporated by reference herein, or in any free writing prospectus that we prepare and distribute. We have not, and the underwriters have not, authorized anyone to provide you with information
different from that contained in or incorporated by reference into this prospectus supplement, the accompanying prospectus or any such free writing prospectus. If anyone provides you with different or inconsistent information, you should not rely on
it. You should not assume that the information contained or incorporated by reference in this prospectus supplement or the accompanying prospectus or any information included in any free writing prospectus that we prepare and distribute is accurate
as of any date other than the respective date of such document. Our business, financial condition, results of operation and prospects may have changed since those dates.

This prospectus supplement and the accompanying prospectus do not constitute an offer to sell or a solicitation of an offer to buy by anyone in any jurisdiction in which such offer or solicitation is not
authorized, or in which the person is not qualified to do so or to any person to whom it is unlawful to make such offer or solicitation.

Before you invest in the notes, you should carefully read the registration statement (including the exhibits thereto) of which this prospectus supplement and the accompanying prospectus form a part, this
prospectus supplement, the accompanying prospectus and the documents incorporated by reference into this prospectus supplement and accompanying prospectus. The incorporated documents are described under Where You Can Find More
Information.

In this prospectus supplement, unless otherwise expressly set forth or as the context otherwise indicates,
the terms Owens Corning, Company, we, our and us refer to Owens Corning, a Delaware corporation, and its subsidiaries.

Our disclosure and analysis in this prospectus supplement and the accompanying prospectus and the materials we have filed
or will file with the Securities and Exchange Commission (the SEC) (including documents incorporated by reference or deemed incorporated by reference herein or therein) (as well as information included in our other written or oral
statements) contain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 (the Securities Act) and Section 21E of the Securities Exchange Act of 1934 (the Exchange Act).
Forward-looking statements present our current forecasts and estimates of future events. These statements do not strictly relate to historical or current results and can be identified by words such as anticipate, believe,
estimate, expect, intend, likely, may, plan, project, strategy, will and other terms of similar meaning or import in connection with any
discussion of future operating, financial or other performance. These forward-looking statements are subject to risks, uncertainties and other factors that could cause actual results to differ materially from those projected in the statements. These
risks, uncertainties and other factors include, without limitation: economic and political conditions, including new legislation or other governmental actions; levels of residential and commercial construction activity; competitive factors; pricing
factors; weather conditions; our level of indebtedness; industry and economic conditions that affect the market and operating conditions of our customers, suppliers or lenders; availability and cost of raw materials; availability and cost of credit;
interest rate movements; issues related to expansion of our production capacity; issues related to acquisitions, divestitures and joint ventures; our ability to utilize our net operating loss carryforwards; achievement of expected synergies, cost
reductions and/or productivity improvements; issues involving implementation of new business systems; foreign exchange fluctuations; research and development activities; difficulties in managing production capacity; and labor disputes.

All forward-looking statements in this prospectus supplement and the accompanying prospectus (including documents incorporated by
reference or deemed incorporated by reference herein or therein) should be considered in the context of the risk and other factors described above and as detailed from time to time in our SEC filings. Any forward-looking statements speak only as of
the date the statement is made and we undertake no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. It is not possible to identify all of the risks, uncertainties and
other factors that may affect future results. In light of these risks and uncertainties, the forward-looking events and circumstances discussed in this prospectus supplement and the accompanying prospectus and the documents incorporated or deemed
incorporated by reference herein and therein may not occur and actual results could differ materially from those anticipated or implied in the forward-looking statements. Accordingly, users of this prospectus supplement and the accompanying
prospectus (including documents incorporated by reference or deemed incorporated by reference herein or therein) are cautioned not to place undue reliance on the forward-looking statements.

We file annual, quarterly and current reports, proxy statements and other information with the SEC. The SEC allows us to
incorporate by reference into this prospectus supplement the information we file with the SEC, which means that we can disclose important information to you by referring you to those documents. The information incorporated by reference
is considered to be part of this prospectus supplement, and information that we file later with the SEC will automatically update and supersede this information. SEC rules and regulations also permit us to furnish rather than
file certain reports and information with the SEC. Any such reports or information which we furnish or have furnished shall not be deemed to be incorporated by reference into or otherwise become a part of this
prospectus supplement, regardless of when furnished to the SEC.

We incorporate by reference the following documents we have
already filed with the SEC (file number 1-33100) and any future filings that we will make with the SEC under Sections 13(a), 13(c), 14, or 15(d) of the Exchange Act (other than any portion of such filings that are furnished under applicable SEC
rules rather than filed) until the offering of the notes under this prospectus supplement is complete:



Annual Report on Form 10-K for the year ended December 31, 2011;



Quarterly Report on Form 10-Q for the quarter ended March 31, 2012;



Quarterly Report on Form 10-Q for the quarter ended June 30, 2012;



Current Report on Form 8-K filed with the SEC on February 23, 2012;



Current Report on Form 8-K filed with the SEC on April 19, 2012;



Current Report on Form 8-K filed with the SEC on June 18, 2012; and



Current Report on Form 8-K filed with the SEC on August 16, 2012.

Our SEC filings are available free of charge through our Internet website at www.owenscorning.com as soon as reasonably
practicable after we electronically file these materials with the SEC. You may access these SEC filings on our website. However, the information on our website is not a part of this prospectus supplement or the accompanying prospectus or other
offering materials. You may also request a copy of any of these filings at no cost, by writing or telephoning us at:

Owens
Corning

One Owens Corning Parkway

Toledo, OH 43659

Attention: Corporate Secretary

Telephone: (419) 248-8000

Our SEC filings are also available at the SECs website at http://www.sec.gov. You may read and copy any documents that we file with the SEC at the SECs Public Reference Room at 100 F Street,
N.E., Washington, D.C. 20549. You can request copies of these documents by writing to the SEC and paying a fee for the copying cost. Please call the SEC at 1-800-SEC-0330 for more information on the operation of the Public Reference Room.

This prospectus supplement and the accompanying prospectus are not prospectuses for the purposes of the European Unions Directive
2003/71/EC (and any amendments thereto, including Directive 2010/73/EU) as implemented in member states of the European Economic Area (the Prospectus Directive). Neither we nor the underwriters have authorized, nor do we or they
authorize, the making of any offer of the notes through any financial intermediary, other than offers made by underwriters which constitute the final placement of the notes contemplated in this prospectus supplement and the accompanying prospectus.

NOTICE TO UNITED KINGDOM INVESTORS

In addition, in the United Kingdom, this document is being distributed only to, and is directed only at, and any offer subsequently made may only be directed at persons who are qualified
investors (as defined in the Prospectus Directive) (i) who have professional experience in matters relating to investments falling within Article 19 (5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005,
as amended (the Order) and/or (ii) who are high net worth companies (or persons to whom it may otherwise be lawfully communicated) falling within Article 49(2)(a) to (d) of the Order (all such persons together being referred to
as relevant persons). This document must not be acted on or relied on in the United Kingdom by persons who are not relevant persons. In the United Kingdom, any investment or investment activity to which this document relates is only
available to, and will be engaged in with, relevant persons.

This summary highlights selected information from this prospectus supplement and does not contain all of the information that you
should consider in making your investment decision. You should read this summary together with the more detailed information appearing elsewhere in this prospectus supplement, as well as the information in the accompanying prospectus and in the
documents incorporated by reference or deemed incorporated by reference into this prospectus supplement or the accompanying prospectus. You should carefully consider, among other things, the matters discussed in the sections titled Risk
Factors in this prospectus supplement and in our Annual Report on Form 10-K for the year ended December 31, 2011. In addition, certain statements include forward-looking information that involves risks and uncertainties. See
Cautionary Statement Concerning Forward-Looking Statements above.

Our Company

Owens Corning is incorporated in Delaware and headquartered in Toledo, Ohio. Owens Corning was founded in 1938. Since then the Company
has continued to grow as a market-leading innovator of glass fiber technology. Owens Corning is a world leader in composite and building materials systems, delivering a broad range of high-quality products and services. Our products range from glass
fiber used to reinforce composite materials for transportation, electronics, marine, infrastructure, wind-energy and other high-performance markets to insulation and roofing for residential, commercial and industrial applications.

We operate within two segments: Composites, which includes our Reinforcements and Downstream businesses, and Building Materials, which
includes our Insulation and Roofing businesses.

Our principal executive offices are located at One Owens Corning Parkway,
Toledo, Ohio 43659 and our telephone number is (419) 248-8000.

Tender Offers

Concurrently with this offering, we are conducting offers to purchase an aggregate principal amount of up to $250 million of our 6.50%
senior notes due December 1, 2016 and an aggregate principal amount of up to $100 million of our 9.00% senior notes due June 15, 2019.

As of September 30, 2012, $650 million aggregate principal amount of our 2016 senior notes and $350 million aggregate principal amount of our 2019 senior notes were outstanding. The tender offers are
not conditioned upon any minimum amount of notes being tendered, and we may, in our sole discretion, increase the aggregate principal amount of notes of either series that we are offering to repurchase in the tender offers. The tender offers are
conditioned upon the consummation of this offering, as well as other conditions.

If we purchase the entire $250 million
aggregate principal amount of our 2016 senior notes and $100 million aggregate principal amount of our 2019 senior notes in the tender offers, we anticipate that we will incur a loss from debt extinguishment resulting in a charge of
approximately $65 million in the fourth quarter of 2012.

On October 9, 2012, we announced preliminary third-quarter adjusted earnings before interest and taxes (EBIT) of $81 million. In the third quarter of 2012, we had $22 million of certain items
that were not the result of current operations. Before adjusting for these items, preliminary third-quarter EBIT is $59 million. In 2011, there were no adjusted items to reported EBIT. In addition, we lowered our 2012 earnings outlook, reflecting a
weaker environment for our Roofing and Composites businesses and noted that the primary uncertainty through the remainder of the year is attributed to roofing volumes.

The following summary contains basic information about the notes. It does not contain all the information that is important to you. For a
more complete understanding of the notes, please refer to the section of this prospectus supplement titled Description of the Notes and the section of the accompanying prospectus titled Description of Debt Securities.

Issuer

Owens Corning.

Notes Offered

$ aggregate principal amount of % Senior Notes due .

Maturity

, .

Interest Payment Dates

and of each year, beginning
, 2013.

Guarantees

All payments with respect to the notes (including principal and interest) will be fully and unconditionally guaranteed, jointly and severally, by each of our current and future domestic
subsidiaries that is a borrower or guarantor under our Credit Agreement.

Ranking

The notes and the subsidiary guarantees will be our and the guarantors general senior unsecured obligations. They will rank equally in right of payment with our and the guarantors
existing and future senior unsecured indebtedness. The notes and the subsidiary guarantees will be effectively subordinated to any of our and the guarantors existing and future secured debt, to the extent of the value of the collateral
securing such debt, and will be structurally subordinated to all existing and future obligations of our subsidiaries that are not guarantors.

The indenture does not restrict our ability or the ability of our subsidiaries to incur other unsecured indebtedness. At June 30, 2012:

our subsidiaries guaranteeing the notes had indebtedness, including subsidiary guarantees of the Companys indebtedness, of approximately $2,237
million, of which approximately $269 million was secured.

As of and for the six months ended June 30, 2012, and the year ended December 31, 2011, without including eliminations for investments in subsidiaries and
intercompany transactions, our non-guarantor subsidiaries (i) had net sales of $976 million and $2.0 billion and net earnings (loss) attributable to Owens Corning of $(66) and $154 million, respectively, (ii) had total assets of $4.8
billion and $4.6 billion, respectively, and (iii) had indebtedness of $268 million and $215 million, respectively. For a presentation of the financial

information required by Rule 3-10 of Regulation S-X for our subsidiaries guaranteeing the notes and our non-guarantors subsidiaries, see Note to Consolidated Financial Statements
No. 17, Condensed Consolidating Financial Statements in our Quarterly Report on Form 10-Q for the quarter ended June 30, 2012 and Note to Consolidated Financial Statements No. 27, Condensed Consolidating Financial
Statements, in our Annual Report on form 10-K for the year ended December 31, 2011.

Optional Redemption

The notes will be redeemable, in whole at any time or in part from time to time, at our option. If we elect to redeem the notes prior to
(three months prior to the maturity date of the notes), the redemption price will include a make-whole premium. If we elect to redeem the notes on or after
, we will pay a redemption price of 100% of the aggregate principal amount of the notes to be redeemed. See Description of
the NotesOptional Redemption in this prospectus supplement.

Change of Control

If we experience a Change of Control Repurchase Event, we will be required to make an offer to repurchase the notes at a price equal to 101% of their principal amount, plus accrued and unpaid
interest to the date of repurchase. See Description of the NotesChange of Control in this prospectus supplement.

Certain Covenants

The indenture governing the notes contains certain covenants that limit, among other things, our ability and the ability of our subsidiaries to:



incur liens on certain properties to secure debt;



engage in sale-leaseback transactions; and



merge or consolidate with another entity or sell, lease or transfer substantially all of our properties or assets to another entity.

These covenants are subject to a number of important exceptions and limitations, which are described in the sections titled Description of Debt
SecuritiesCertain Covenants and Description of Debt SecuritiesMerger or Consolidation in the accompanying prospectus.

Sinking Fund

None.

Use of Proceeds

We estimate the net proceeds to us from the sale of the notes will be approximately $ , after deducting the underwriting discount and other
expenses of the offering payable by us. We intend to use a portion of the net proceeds from this offering to fund the repurchase of our 2016 senior notes and our 2019 senior notes in the tender offers. The remaining net proceeds will be used
(i) first, to repay outstanding borrowings under our revolving credit facility and (ii) second, for general corporate purposes. See Use of Proceeds in this prospectus supplement.

Certain affiliates of the underwriters are lenders under our $800 million revolving credit facility and will receive some of the net proceeds from this offering. In the event that any of Merrill
Lynch, Pierce, Fenner & Smith Incorporated, J.P. Morgan Securities LLC or Wells Fargo Securities, LLC, together with their respective affiliates, receive at least 5% of the net proceeds of this offering, such underwriters will be deemed to have
a conflict of interest within the meaning of FINRA Rule 5121. However, in accordance with FINRA Rule 5121, no qualified independent underwriter is required because the notes are investment grade-rated by one or more
nationally recognized statistical rating agencies. See Underwriting (Conflicts of Interest)Conflicts of Interest in this prospectus supplement.

Denominations

The notes will be issued only in denominations of $2,000 and integral multiples of $1,000 in excess of $2,000.

Form of Note

We will issue the notes in the form of one or more fully registered global notes registered in the name of the nominee of The Depository Trust Company, or DTC, or its nominee. See
Description of the NotesBook-Entry, Delivery and Form.

Trustee

Wells Fargo Bank, National Association.

Governing Law

The laws of the State of New York govern the indenture and the notes, without regard to conflicts of law principles thereof.

The following tables set forth our summary of selected historical financial data presented on a consolidated basis and include the
accounts of Owens Corning and our subsidiaries.

We have derived the summary financial information for each of the years ended
December 31, 2009 through December 31, 2011 from our audited consolidated financial statements. The summary financial information for each of the six months ended June 30, 2011 and June 30, 2012 is unaudited and includes all
adjustments (consisting of normal recurring items) which are, in our opinion, necessary for a fair presentation of our financial position as of such dates and results of operations for such periods. Our summary of selected historical financial data
is not necessarily indicative of our future financial position, future results of operations or future cash flows.

You should
read the information set forth below in conjunction with all information included and incorporated by reference in this prospectus supplement, including our historical consolidated financial statements and notes to those statements from our Annual
Report on Form 10-K for the year ended December 31, 2011 and our Quarterly Report on Form 10-Q for the quarter ended June 30, 2012.

Six Months EndedJune
30,

Twelve Months
EndedDecember 31,

2012(a)

2011

2011

2010(b)

2009(c)

(in millions, except per share data)

(unaudited)

(unaudited)

Statements of Earnings (Loss) Data:

Net sales

$

2,737

$

2,689

$

5,335

$

4,997

$

4,803

Gross margin

425

481

1,028

956

849

Marketing and administrative expenses

265

276

525

516

522

Earnings from continuing operations before interest and taxes

73

196

461

206

192

Interest expense, net

56

53

108

110

111

Income tax expense (benefit)

22

40

74

(840

)

14

Earnings (loss) from continuing operations

(5

)

104

281

940

67

Net earnings (loss) attributable to Owens Corning

(7

)

102

276

933

64

Earnings (loss) per common share attributable to Owens Corning common stockholders:

Basic earnings (loss) per common share

$

(0.06

)

$

0.82

$

2.25

$

7.43

$

0.51

Diluted earnings (loss) per common share

$

(0.06

)

$

0.81

$

2.23

$

7.37

$

0.50

Weighted-Average Common Shares:

Basic

120.9

124.0

122.5

125.6

124.8

Diluted

120.9

125.4

123.5

126.6

127.1

Balance Sheet Data:

Total assets

$

7,715

$

7,573

$

7,527

$

7,158

$

7,167

Long-term debt, net of current portion

$

2,205

$

1,725

$

1,930

$

1,629

$

2,177

Total equity

$

3,651

$

3,823

$

3,741

$

3,686

$

2,853

(a)

During the first six months of 2012, we recorded $87 million in charges related to cost reduction actions and related items (comprised of $36 million of severance costs
and $51 million of other costs, inclusive of $34 million of accelerated depreciation and $17 million of other charges) related to our European restructuring actions.

(b)

During 2010, we recorded impairment charges of $117 million, $40 million in charges related to cost reduction actions and related items (comprised of $29 million of
severance costs and $11 million of other costs), and charges of $13 million of integration costs related to the acquisition of Saint-Gobains reinforcements and composite fabrics business in 2007 (2007 Acquisition).

(c)

During 2009, we recorded $53 million in charges related to cost reduction actions and related items (comprised of $34 million of severance costs and $19 million of
other costs, inclusive of $13 million of accelerated depreciation), charges of $33 million of integration costs related to the 2007 Acquisition, and $29 million for charges related to our employee emergence equity program.

An investment in the notes involves significant risks. Before purchasing any notes, and in consultation with your own financial and legal
advisors, you should carefully consider and evaluate the information included and incorporated by reference or deemed to be incorporated by reference in this prospectus supplement and the accompanying prospectus, including the risk factors
incorporated by reference herein from our Annual Report on Form 10-K for the year ended December 31, 2011, as updated by annual, quarterly and other reports and documents we file with the SEC after the date of this prospectus supplement and
that are incorporated by reference herein or in the accompanying prospectus. Our business, financial position, results of operations or liquidity could be adversely affected by any of these risks. In addition, please read the information included
under Cautionary Statement Concerning Forward-Looking Statements.

Risks Relating to the Notes

The notes will be effectively subordinated to all of our existing and future secured debt, to the existing and future secured debt
of our subsidiary guarantors, and to the existing and future debt of our subsidiaries that do not guarantee the notes.

The notes are not secured by any of our assets or the assets of our subsidiary guarantors. As a result, the indebtedness represented by
the notes will effectively be subordinated to any secured indebtedness we or our subsidiary guarantors may incur, to the extent of the value of the assets securing such indebtedness. The terms of the indenture permit us and the subsidiary guarantors
to incur secured debt, subject to limitations. In the event of any distribution or payment of our assets in any foreclosure, dissolution, winding up, liquidation or reorganization, or other bankruptcy proceeding, any secured creditors would have a
superior claim to their collateral. In the event of the dissolution, winding up, liquidation or reorganization, or other bankruptcy proceeding of a subsidiary that is not a guarantor, creditors of that subsidiary would generally have the right to be
paid in full before any distribution is made to us or the holders of the notes. If any of the foregoing occur, we cannot assure you that there will be sufficient assets to pay amounts due on the notes.

The indenture does not restrict our ability or the ability of our subsidiaries to incur other unsecured indebtedness. At June 30,
2012:

our subsidiaries guaranteeing the notes had indebtedness, including subsidiary guarantees of the Companys indebtedness, of approximately $2,237
million, of which approximately $269 million was secured.

As of and for the six months ended June 30,
2012 and the year ended December 31, 2011, without including eliminations for investments in subsidiaries and intercompany transactions, our non-guarantor subsidiaries (i) had net sales of approximately $976 million and $2.0 billion and
net earnings (loss) attributable to Owens Corning of approximately $(66) and $154 million, respectively, (ii) had total assets of approximately $4.8 billion and $4.6 billion, respectively, and (iii) had indebtedness of approximately $268
million and $215 million, respectively. For a presentation of the financial information required by Rule 3-10 of Regulation S-X for our subsidiaries guaranteeing the notes and our non-guarantors subsidiaries, see Note to Consolidated Financial
Statements No. 17, Condensed Consolidating Financial Statements in our Quarterly Report on Form 10-Q for the quarter ended June 30, 2012 and Note to Consolidated Financial Statements No. 27, Condensed Consolidating
Financial Statements, in our Annual Report on Form 10-K for the year ended December 31, 2011.

We may be unable to repurchase the notes if we experience a change of control and a
related downgrade in the credit rating of the notes.

Under certain circumstances, we are required, under the terms of
the notes, to offer to purchase all of the outstanding notes at 101% of their principal amount if we experience a change of control and a related downgrade in the credit rating of the notes. Our failure to repay holders tendering notes upon a change
of control and related downgrade will result in an event of default under the notes. If a change in control and a related downgrade were to occur, we cannot assure you that we would have sufficient funds to purchase the notes, or any other
securities that we would be required to offer to purchase, particularly if that change of control event triggers a similar repurchase requirement for, or results in the acceleration of, other indebtedness. Certain series of our currently outstanding
senior notes also are subject to similar change of control repurchase requirements. In addition, our credit facility currently provides that certain change of control events will constitute a default and could result in the acceleration of our
indebtedness. We may require additional financing from third parties to fund any such purchases, but we cannot assure you that we would be able to obtain such financing.

The change of control provision may not protect you in the event we consummate a highly leveraged transaction, reorganization, restructuring, merger or other similar transaction, unless such transaction
constitutes a change of control repurchase event. Such a transaction may not involve a change of the magnitude required under the definition of change of control or may not result in a ratings downgrade to trigger our obligation to repurchase the
notes. Except as described under Description of the NotesChange of Control, the notes do not contain provisions that permit the holders of the notes to require us to repurchase or redeem the notes in the event of a takeover,
recapitalization or similar transaction.

There may not be a public market for the notes.

The notes are a new issue of securities with no established trading market. We do not currently intend to apply for listing of the notes
on any securities exchange or to include the notes in any automated quotation system. We have been advised by the underwriters that they presently intend to make a market in the notes after completion of the offering. However, they are under no
obligation to do so and may discontinue any market-making activities at any time without any notice. Accordingly, there can be no assurance that a trading market for the notes will develop or be maintained. If the notes are traded, they may trade at
a discount from their offering price, depending on prevailing interest rates, the market for similar securities, our performance and other factors. To the extent that an active trading market does not develop, you may not be able to resell your
notes at their fair market value or at all.

A court may use fraudulent conveyance considerations to avoid or
subordinate the subsidiary guarantees.

Various applicable fraudulent conveyance laws have been enacted for the
protection of creditors. A court may use fraudulent conveyance laws to subordinate or avoid the subsidiary guarantees of the notes issued by any of our subsidiary guarantors. It is also possible that under certain circumstances a court could hold
that the direct obligations of a subsidiary guaranteeing the notes could be superior to the obligations under that guarantee. A court could avoid or subordinate the guarantee of the notes by any of our subsidiaries in favor of that subsidiarys
other debts or liabilities to the extent that the court determined either of the following were true at the time the subsidiary issued the guarantee:



that subsidiary incurred the guarantee with the intent to hinder, delay or defraud any of its present or future creditors or that subsidiary
contemplated insolvency with a design to favor one or more creditors to the total or partial exclusion of others; or



that subsidiary did not receive fair consideration or reasonable equivalent value for issuing the guarantee and, at the time it issued the guarantee,
that subsidiary:



was insolvent or rendered insolvent by reason of the issuance of the guarantee;

was engaged or about to engage in a business or transaction for which the remaining assets of that subsidiary constituted unreasonably small capital;
or



intended to incur, or believed that it would incur, debts beyond its ability to pay such debts as they matured.

The measure of insolvency for purposes of the foregoing will vary depending upon the law of the relevant jurisdiction. Generally,
however, an entity would be considered insolvent for purposes of the foregoing if the sum of its debts, including contingent liabilities, were greater than the fair saleable value of all of its assets at a fair valuation, or if the present fair
saleable value of its assets were less than the amount that would be required to pay its probable liability on its existing debts, including contingent liabilities, as they become absolute and matured.

Among other things, a legal challenge of a subsidiarys guarantee of the notes on fraudulent conveyance grounds may focus on the
benefits, if any, realized by that subsidiary as a result of our issuance of the notes. To the extent a subsidiarys guarantee of the notes is avoided as a result of fraudulent conveyance or held unenforceable for any other reason, the note
holders would cease to have any claim in respect of that guarantee.

The terms of the indenture and the notes provide
only limited protection against significant events that could adversely impact your investment in the notes.

As
described under Description of the NotesChange of Control, upon the occurrence of a Change of Control Repurchase Event, holders are entitled to require us to repurchase their notes. However, the definition of the term Change
of Control Repurchase Event is limited and does not cover a variety of transactions (such as acquisitions by us or recapitalizations) that could negatively impact the value of your notes. As such, if we were to enter into a significant
corporate transaction that would negatively impact the value of the notes, but which would not constitute a Change of Control Repurchase Event, you would not have any rights to require us to repurchase the notes prior to their maturity.

Furthermore, the indenture for the notes does not:



require us to maintain any financial ratios or specific levels of net worth, revenues, income, cash flow or liquidity;



limit our ability to incur indebtedness or other obligations that are equal in right of payment to the notes or prohibit us from incurring secured debt
to which the notes would be effectively subordinated and which could affect our credit ratings;



restrict our subsidiaries ability to issue securities or otherwise incur indebtedness or other obligations that would be senior to our equity
interests in our subsidiaries and therefore rank effectively senior to the notes with respect to the assets of our subsidiaries;



restrict our ability to repurchase or prepay any other of our securities or other indebtedness; or



restrict our ability to make investments or to repurchase, or pay dividends or make other payments in respect of, our common stock or other securities
ranking junior to the notes.

As a result of the foregoing, when evaluating the terms of the notes, you should be aware that
the terms of the indenture and the notes do not restrict our ability to engage in, or to otherwise be a party to, a variety of corporate transactions, circumstances and events that could have an adverse impact on your investment in the notes.

We may choose to redeem the notes prior to maturity.

We may redeem some or all of the notes at any time. See Description of the NotesOptional Redemption. If prevailing
interest rates are lower at the time of redemption, you may not be able to reinvest the redemption proceeds in a comparable security at an interest rate as high as the interest rate of the notes being redeemed.

As increase in market interest rates could result in a decrease in the value of the
notes.

In general, as market interest rates rise, notes bearing interest at a fixed rate decline in value because the
premium, if any, over market interest rates will decline. Consequently, if you purchase the notes and market interest rates increase, the market value of your notes may decline. We cannot predict the future level of market interest rates.

Changes in our credit ratings may adversely affect your investment in the notes.

The credit ratings of our indebtedness are an assessment by rating agencies of our ability to pay our debts when due. These ratings are
not recommendations to purchase, hold or sell the notes, inasmuch as the ratings do not comment as to market price or suitability for a particular investor, are limited in scope, and do not address all material risks relating to an investment in the
notes, but rather reflect only the view of each rating agency at the time the rating is issued. The ratings are based on current information furnished to the ratings agencies by us and information obtained by the ratings agencies from other sources.
An explanation of the significance of such rating may be obtained from such rating agency. There can be no assurance that such credit ratings will remain in effect for any given period of time or that such ratings will not be lowered, suspended or
withdrawn entirely by the rating agencies, if, in each rating agencys judgments, circumstances so warrant. Actual or anticipated changes or downgrades in our credit ratings, including any announcement that our ratings are under review for a
downgrade, could affect the market value and liquidity of the notes and increase our borrowing costs.

We estimate the net proceeds to us from the sale of the notes will be approximately $ ,
after deducting the underwriting discount and other expenses of the offering payable by us.

Concurrently with this offering,
we are conducting offers to purchase an aggregate principal amount of up to $250 million of our 6.50% senior notes due December 1, 2016 and an aggregate principal amount of up to $100 million of our 9.00% senior notes due June 15, 2019.

As of September 30, 2012, $650 million aggregate principal amount of our 2016 senior notes and $350 million aggregate
principal amount of our 2019 senior notes were outstanding. The tender offers are not conditioned upon any minimum amount of notes being tendered, and we may, in our sole discretion, increase the aggregate principal amount of notes that we are
offering to repurchase in the tender offers. The tender offers are conditioned upon the consummation of this offering, as well as other conditions.

We intend to use a portion of the net proceeds of this offering to fund the repurchase of our 2016 senior notes and 2019 senior notes in the tender offers, including the payment of accrued interest and
any applicable tender premiums. The remaining net proceeds will be used (i) first, to repay outstanding borrowings under our $800 million revolving credit facility, and (ii) second, for general corporate purposes. As of September 30,
2012, we had approximately $390 million of outstanding borrowings under the revolving credit facility at a weighted average interest rate of 1.8% per annum. The revolving credit facility expires in July 2016.

The following table sets forth our ratio of earnings to fixed charges for the periods indicated:

Six Months EndedJune 30, 2012

Twelve Months EndedDecember, 31

2011

2010

2009

2008

2007

Ratio of Earnings to Fixed Charges

1.2

3.3

1.6

1.5

1.7

1.1

The computation of the ratio of earnings to fixed charges is as follows (in millions):

Six Months EndedJune 30, 2012(a)

Twelve Months Ended December 31,

2011(b)

2010(b)

2009(b)

2008(b)

2007(b)

Earnings:

Earnings from continuing operations before taxes

$

17

$

353

$

96

$

81

$

118

$

22

Fixed charges (see below)

69

149

146

146

163

177

Amortization of capitalized interest

3

4

3

3

2

1

Capitalized interest

(8

)

(13

)

(10

)

(10

)

(9

)

(11

)

Noncontrolling interest in pre-tax income of subsidiaries that have not incurred fixed charges













Earnings, as adjusted

$

81

$

493

$

235

$

220

$

274

$

189

Fixed charges:

Portion of rents representative of interest expense

$

4

$

25

$

23

$

24

$

31

$

32

Interest on indebtedness, including amortization of deferred loan costs

57

111

113

112

123

134

Capitalized interest

8

13

10

10

9

11

Total fixed charges

$

69

$

149

$

146

$

146

$

163

$

177

(a)

The portion of rents representative of interest expense is 11% of rent expense.

(b)

The portion of rents representative of interest expense is 33% of rent expense.

The following table sets forth our ratio of earnings to fixed charges and the computation of the ratio of earnings to fixed charges for the periods indicated, on a pro forma, as adjusted basis to give
effect to the issuance and sale of the notes and, for purposes of this presentation, assuming (i) the repurchase of an aggregate principal amount of $250 million of our 2016 senior notes and an aggregate principal amount of $100 million of our
2019 senior notes pursuant to the tender offers and (ii) the repayment of outstanding borrowings under our revolving credit facility, in each case as described under Use of Proceeds in this prospectus supplement.

consolidated capitalization as of June 30, 2012, on a pro forma, as adjusted basis to give effect to the issuance and sale of the notes and, for
purposes of this presentation, assuming (i) the repurchase of an aggregate principal amount of $250 million of our 2016 senior notes and an aggregate principal amount of $100 million of our 2019 senior notes pursuant to the tender offers and
(ii) the repayment of outstanding borrowings under our revolving credit facility, in each case as described under Use of Proceeds in this prospectus supplement.

You should read this table in conjunction with our Summary of Selected Historical Financial Data and our historical
consolidated financial statements and related notes thereto and Managements Discussion and Analysis of Financial Condition and Results of Operation included in our Annual Report on Form 10-K for the year ended December 31,
2011, our Quarterly Report on Form 10-Q for the quarter ended March 31, 2012 and our Quarterly Report on Form 10-Q for the quarter ended June 30, 2012, each of which are incorporated by reference in this prospectus supplement and the
accompanying prospectus. See Where You Can Find More Information.

Borrowings pursuant to this offering do not reflect the discount to the public of % and underwriting discount of %.

(b)

We can give no assurances as to the principal amount of the 2016 senior notes or 2019 senior notes that we may purchase pursuant to the tender offers or that we will
purchase any 2016 senior notes or 2019 senior notes at all. Any net proceeds not used to fund the purchase of our debt securities pursuant to the tender offers or to repay outstanding borrowings under our revolving credit facility will be used for
general corporate purposes. See Use of Proceeds in this prospectus supplement.

The notes will be issued under an indenture dated as of June 2, 2009, among us, the Guarantors and Wells Fargo Bank, National
Association, as amended and as supplemented to reflect the terms of the notes. We refer to such indenture, as amended or supplemented from time to time, as the indenture. The following description of the particular terms of the notes
supplements, and to the extent inconsistent therewith replaces, the section entitled Description of Debt Securities included in the accompanying prospectus. You should read the accompanying prospectus and this prospectus supplement
together for a more complete description of the indenture and the notes. This description and the section entitled Description of Debt Securities in the accompanying prospectus are summaries and are not complete, and are subject to and
are qualified in their entirety by, the provisions of the indenture. Capitalized terms used in this Description of the Notes have the meanings specified in the indenture and are generally summarized in this description or under
Description of Debt SecuritiesCertain Definitions in the accompanying prospectus. References to we, us and our in this Description of the Notes refer only to Owens Corning and not any
of its subsidiaries.

General

The Notes

The notes



will be our general senior unsecured obligations;



will rank equal in right of payment with our existing and future senior unsecured indebtedness;



will be effectively subordinated to our senior secured indebtedness to the extent of the value of the collateral securing such indebtedness; and



will be fully and unconditionally guaranteed by the Guarantors (as defined below).

The Subsidiary Guarantees

The notes will be guaranteed by each of our current and future Domestic Subsidiaries that is a borrower or guarantor under our Credit Agreement (each a Guarantor and, collectively, the
Guarantors).

Each guarantee of the notes:



will be the Guarantors general senior unsecured obligations;



will rank equal in right of payment with the Guarantors existing and future senior unsecured indebtedness; and



will be effectively subordinated to the Guarantors secured indebtedness to the extent of the value of the collateral securing such indebtedness.

Principal, Maturity and Interest

In this offering, we will issue $ million in aggregate principal amount of our % Senior Notes due
(the notes). The notes will mature on . We
may issue additional notes from time to time after this offering. See Issuance of Additional Notes.

Interest on the notes will accrue at a rate per annum of % from the issue date or from the most recent date on
which interest has been paid or provided for, payable semi-annually in arrears to holders of record at the close of business on
or immediately preceding the interest payment date on
and of
each year, beginning on , 2013. Interest will be computed on the basis of a 360-day year comprised of twelve 30-day months.

If any interest payment date, maturity date or redemption date falls on a day that is not a
business day, the payment will be made on the next business day with the same force and effect as if made on the relevant interest payment date, maturity date or redemption date. Unless we default on a payment, no interest will accrue for that
period from and after the applicable interest payment date, maturity date or redemption date.

The notes will be issued in
book-entry form only in denominations of $2,000 and in integral multiples of $1,000 in excess of $2,000.

No Sinking
Fund

The notes will not be entitled to any sinking fund.

Payment on the Notes

If a holder of notes has given wire transfer
instructions to us, we will, directly or through the paying agent, pay all principal, interest and premium, if any, on that holders notes in accordance with those instructions. All other payments on the notes will be made at the office or
agency of the paying agent and registrar within the City of Chicago in the State of Illinois unless we elect to make interest payments by check mailed to the note holders at their address set forth in the register of holders.

The trustee will initially act as paying agent and registrar. We may change the paying agent or registrar without prior notice to the
holders of the notes, and we or any of our Subsidiaries may act as paying agent or registrar.

Issuance of Additional Notes

We may from time to time, without the consent of, or notice to, the holders of the notes, reopen the series of debt securities of which
the notes are a part and issue additional notes having the same ranking and the same interest rate, maturity and other terms as the notes, except for the public offering price and the issue date and, if applicable, the initial interest payment date.
Any additional notes having similar terms, together with the notes, will constitute a single series of debt securities under the indenture. No additional such notes may be issued if an event of default has occurred and is continuing with respect to
the series of debt securities of which such notes are a part. Unless the context otherwise requires, for all purposes of the indenture and this Description of the Notes, references to the notes include any additional notes of the same
series actually issued.

In addition, we may issue from time to time other series of debt securities under the indenture
consisting of debentures, other series of notes or other evidences of indebtedness, but such other securities will be separate from and independent of the notes. The indenture does not limit the amount of debt securities or any other debt (whether
secured or unsecured or whether senior or subordinated) which we or our subsidiaries may incur.

Payment and Paying Agents

We will maintain in the place of payment for the notes an office or agency where the notes may be presented or surrendered for payment or
for registration of transfer or exchange and where holders may serve us with notices and demands in respect of the notes and the indenture.

We will give prompt written notice to the trustee of the location, and any change in the location, of such office or agency. If we fail to maintain any required office or agency or fail to furnish the
trustee with the address of such office or agency, presentations, surrenders, notices and demands may be made or served at the corporate trust office of the trustee. We have appointed the trustee as our agent to receive all presentations,
surrenders, notices and demands with respect to the notes.

Subsidiary Guarantees

The notes will be guaranteed by each of our current and future Domestic Subsidiaries that is a borrower or a guarantor under the Credit
Agreement. The Subsidiary Guarantees will be joint and several obligations of the

Guarantors. The obligations of each Guarantor under its Subsidiary Guarantee will be limited as necessary to prevent that guarantee from constituting a fraudulent conveyance under applicable law.
See Risk FactorsA court may use fraudulent conveyance considerations to avoid or subordinate the subsidiary guarantees.

A Guarantor may not sell or otherwise dispose of all or substantially all of its assets to, or consolidate with or merge with or into (whether or not such Guarantor is the surviving Person) another
Person, other than Owens Corning or another Guarantor, unless immediately after giving effect to that transaction, no Default or Event of Default exists.

The guarantee of a Guarantor will be released:

1)

in connection with any sale or other disposition of all of the Capital Stock of such Guarantor to a Person that is not (either before or after giving effect to such
transaction) Owens Corning or a Subsidiary of Owens Corning;

2)

in connection with any sale or other disposition of all or substantially all of the assets of such Guarantor (including by way of merger or consolidation) to a Person
that is not (either before or after giving effect to such transaction) Owens Corning or a Subsidiary of Owens Corning;

3)

upon the release of such Guarantors guarantee of the Credit Agreement; or

4)

upon legal defeasance or satisfaction and discharge of the indenture as provided below under the section titled Discharge, Legal Defeasance and Covenant
Defeasance.

We shall notify the trustee and the holders of the Subsidiary Guarantee of any Guarantor that
is released. The trustee shall execute and deliver an appropriate instrument confirming the release of any such Guarantor upon our request as provided in the indenture.

Optional Redemption

The notes will be redeemable, in whole at any time or
in part from time to time, at our option. If we elect to redeem the notes at any time prior to (three months prior to their maturity), we will pay a redemption price equal to
the greater of (i) 100% of the principal amount of the notes to be redeemed, and (ii) as determined by the Quotation Agent (as defined below), the sum of the present values of the remaining scheduled payments of principal and interest on
the notes being redeemed (excluding any portion of such payments of interest accrued as of the date of redemption), discounted to the date of redemption on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the
Treasury Rate (as defined below), plus basis points, plus, in each case, accrued and unpaid interest thereon to, but not including, the date of redemption. If the notes are redeemed on or after (three
months prior to their maturity), the redemption price will equal 100% of the aggregate principal amount of the notes being redeemed, plus accrued and unpaid interest thereon to, but not including, the date of redemption.

Notice of any redemption will be mailed or otherwise delivered in accordance with applicable DTC procedures at least 30 days, but not
more than 60 days, before the redemption date to each registered holder of notes to be redeemed. Unless we default in payment of the redemption price, on and after the redemption date, interest will cease to accrue on the notes or portion thereof
called for redemption.

We are not required (i) to register, transfer or exchange notes during the period from the
opening of business 15 days before the day a notice of redemption relating to the notes selected for redemption is sent to the close of business on the day that notice is sent, or (ii) to register, transfer or exchange any such note so selected
for redemption, except for the unredeemed portion of any note being redeemed in part.

Selection and Notice

If less than all of the notes are to be redeemed at any time, and if the notes are global notes held by DTC, the applicable operational
procedures of DTC for selection of notes for redemption will apply. If the notes are not global notes held by DTC, the trustee will select notes for redemption on a pro rata basis unless otherwise required by law or applicable stock exchange
requirements.

No notes of $2,000 or less can be redeemed in part. Notices of redemption will be mailed by
first class mail at least 30 but not more than 60 days before the redemption date to each holder of notes to be redeemed at its registered address, except that redemption notices may be mailed more than 60 days prior to a redemption date if the
notice is issued in connection with a defeasance of the notes or a satisfaction and discharge of the indenture. Notices of redemption may not be conditional.

If any note is to be redeemed in part only, the notice of redemption that relates to that note will state the portion of the principal amount of that note that is to be redeemed. A new note in principal
amount equal to the unredeemed portion of the original note will be issued in the name of the holder of notes upon cancellation of the original note. Notes called for redemption become due on the date fixed for redemption.

Change of Control

If a
Change of Control Repurchase Event occurs with respect to the notes, each holder of notes will have the right to require us to repurchase all or any part (equal to $2,000 or integral multiples $1,000 in excess of $2,000) of that holders notes
pursuant to a Change of Control Offer. In the Change of Control Offer, we will offer a Change of Control Payment in cash equal to 101% of the aggregate principal amount of notes repurchased plus accrued and unpaid interest on the notes repurchased
to the date of repurchase, subject to the rights of holders of notes on the relevant record date to receive interest due on the relevant interest payment date (the Change of Control Payment). Within 30 days following any Change of
Control Repurchase Event, we will mail or deliver in accordance with DTC procedures a notice to each holder:

1)

describing the transaction or transactions that constitute the Change of Control Repurchase Event;

2)

offering to repurchase notes on the date specified in the notice (the Change of Control Payment Date) which date will be no earlier than 30 days and no
later than 60 days from the date such notice is mailed; and

3)

stating the instructions determined by us, consistent with this covenant, that a holder must follow in order to have its notes purchased.

We will comply with the requirements of Rule 14e-1 under the Exchange Act and any other securities laws and regulations thereunder to the
extent those laws and regulations are applicable in connection with the repurchase of the notes as a result of a Change of Control Repurchase Event. To the extent that the provisions of any securities laws or regulations conflict with the Change of
Control Repurchase Event provisions of the indenture, we will comply with the applicable securities laws and regulations and will not be deemed to have breached its obligations under the Change of Control Repurchase Event provisions of the notes or
the indenture by virtue of such compliance.

On the Change of Control Payment Date, we will, to the extent lawful:

1)

accept for payment all notes or portions of notes properly tendered pursuant to the Change of Control Offer;

2)

deposit with the paying agent an amount equal to the Change of Control Payment in respect of all notes or portions of notes properly tendered; and

3)

deliver or cause to be delivered to the trustee the notes properly accepted together with an Officers Certificate stating the aggregate principal amount of notes
or portions of notes being purchased by us.

The paying agent will promptly mail to each holder of notes
properly tendered the Change of Control Payment for such notes, and the trustee will promptly authenticate and mail (or cause to be transferred by book entry) to each holder a new note equal in principal amount to any unpurchased portion of the
notes surrendered, if any. We will publicly announce the results of the Change of Control Offer on or as soon as practicable after the Change of Control Payment Date.

We will not be required to make a Change of Control Offer upon a Change of Control
Repurchase Event if a third party makes the Change of Control Offer in the manner, at the times and otherwise in compliance with the requirements applicable to a Change of Control Offer made by us and purchases all notes properly tendered and not
withdrawn under the Change of Control Offer.

The definition of Change of Control includes a phrase relating to the direct or
indirect sale, lease, transfer, conveyance or other disposition of all or substantially all of our properties or assets and our Subsidiaries taken as a whole. Although there is a limited body of case law interpreting the phrase
substantially all, there is no precise established definition of the phrase under applicable law. Accordingly, the ability of a holder of notes to require us to repurchase our notes as a result of a sale, lease, transfer, conveyance or
other disposition of less than all of our assets and our Subsidiaries taken as a whole to another Person or group may be uncertain.

Covenant Modification

The indenture contains a covenant (Section 4.10 of the indenture), which, subject to certain exceptions, requires that we preserve and
keep in full force and effect (i) our corporate existence and the entity existence of each our subsidiaries in accordance with our and our subsidiaries respective organizational documents and (ii) our and each of our subsidiaries
rights, licenses and franchises; provided that we are not required to preserve any such right, license, franchise or entity existence if the Board of Directors (as defined in the indenture) shall determine that the preservation thereof is no longer
desirable in the conduct of our and our subsidiaries business, taken as a whole, and that the loss thereof is not adverse in any material respect to the holders of securities issued under the indenture.

In the supplement to the indenture which creates the terms of the notes offered hereby, we have modified this covenant as it applies to
the notes so that the determination regarding the preservation of any right, license, franchise or entity existence by us or any of our subsidiaries will need to be made by Owens Corning, but not specifically by the Board of Directors.

Discharge, Legal Defeasance and Covenant Defeasance

We may be discharged from all of our obligations with respect to the outstanding notes, be discharged from our obligations with respect to the notes (except as otherwise specified in the indenture) or be
released from our obligation to comply with the provisions of the indenture with respect to the notes as described under Description of Debt SecuritiesDischarge, Legal Defeasance and Covenant Defeasance in the accompanying
prospectus.

The Trustee Under the Indenture

We maintain ordinary banking relationships and, from time to time, obtain credit facilities and lines of credit with a number of banks, including the trustee, Wells Fargo Bank, National Association, and
its affiliates. Wells Fargo Bank, National Association, acts as the administrative agent for our revolving credit facility.

Governing Law

The indenture is, and any notes will be, governed by and construed in accordance with the laws of the State of New York.

Book-Entry, Delivery and Form

Global Notes

We will issue the notes in the form of one or more
global notes in definitive, fully registered, book-entry form. The global notes will be deposited with, or on behalf of, DTC and registered in the name of Cede & Co., as nominee of DTC (including Euroclear Bank, S.A./N.V. and Clearstream
Banking, societé anonyme).

Beneficial interests in the global notes will be represented through book-entry accounts of financial institutions acting on behalf of beneficial owners as direct and indirect participants in DTC.

DTC is a limited-purpose trust company organized under the New York Banking Law, a banking organization within
the meaning of the New York Banking Law, a member of the Federal Reserve System, a clearing corporation within the meaning of the New York Uniform Commercial Code and a clearing agency registered pursuant to the provisions of
Section 17A of the Exchange Act. DTC was created to hold securities of its participants and to facilitate the clearance and settlement of securities transactions, such as transfers and pledges, among its participants in such securities through
electronic computerized book-entry changes in accounts of the participants, thereby eliminating the need for physical movement of securities certificates. DTCs participants include securities brokers and dealers, banks, trust companies,
clearing corporations and certain other organizations, some of whom own DTC. Access to DTCs book-entry system is also available to others, such as banks, brokers, dealers and trust companies that clear through or maintain a custodial
relationship with a participant, either directly or indirectly. The rules applicable to DTC and its participants are on file with the SEC.

We have provided the description of the operations and procedures of DTC in this prospectus supplement solely as a matter of convenience. These operations and procedures are solely within the control of
DTC and are subject to change by DTC from time to time. None of us, the underwriters or the trustee takes any responsibility for these operations or procedures, and you are urged to contact DTC or its participants directly to discuss these matters.

We expect that under procedures established by DTC:



upon deposit of the global notes with DTC or its custodian, DTC will credit on its book-entry registration and transfer system the accounts of direct
participants designated by the underwriters with portions of the principal amounts of the global notes; and



ownership of the notes will be shown on, and the transfer of ownership thereof will be effected only through, records maintained by DTC or its nominee,
with respect to interests of direct participants, and the records of direct and indirect participants, with respect to interests of persons other than participants.

The laws of some jurisdictions may require that purchasers of securities take physical delivery of those securities in definitive form.
Accordingly, the ability to transfer interests in the notes represented by a global note to those persons may be limited. In addition, because DTC can act only on behalf of its participants, who in turn act on behalf of persons who hold interests
through participants, the ability of a person having an interest in notes represented by a global note to pledge or transfer those interests to persons or entities that do not participate in DTCs system, or otherwise to take actions in respect
of such interest, may be affected by the lack of a physical definitive security in respect of such interest.

So long as DTC
or its nominee is the registered owner of a global note, DTC or that nominee will be considered the sole owner or holder of the notes represented by that global note for all purposes under the indenture and under the notes. Except as provided below,
owners of beneficial interests in a global note will not be entitled to have notes represented by that global note registered in their names, will not receive or be entitled to receive physical delivery of certificated notes and will not be
considered the owners or holders thereof under the indenture or under the notes for any purpose, including with respect to the giving of any direction, instruction or approval to the trustee. Accordingly, each holder owning a beneficial interest in
a global note must rely on the procedures of DTC and, if that holder is not a direct or indirect participant, on the procedures of the participant through which that holder owns its interest, to exercise any rights of a holder of notes under the
indenture or a global note.

Neither we nor the trustee will have any responsibility or liability for any aspect of the
records relating to or payments made on account of notes by DTC or for maintaining, supervising or reviewing any records of DTC relating to the notes.

Payments on the notes represented by the global notes will be made to DTC or its nominee, as
the case may be, as the registered owner thereof. We expect that DTC or its nominee, upon receipt of any payment on the notes represented by a global note, will credit participants accounts with payments in amounts proportionate to their
respective beneficial interests in the global note as shown in the records of DTC or its nominee. We also expect that payments by participants to owners of beneficial interests in the global note held through such participants will be governed by
standing instructions and customary practice as is now the case with securities held for the accounts of customers registered in the names of nominees for such customers. The participants will be responsible for those payments.

Certificated Notes

We will issue certificated notes to each person that DTC identifies as the beneficial owner of the notes represented by a global note upon surrender by DTC of the global note if:



DTC notifies us that it is no longer willing or able to act as a depositary for such global note or ceases to be a clearing agency registered under the
Exchange Act and we have not appointed a successor depositary within 90 days of that notice or becoming aware that DTC is no longer so registered;



an event of default has occurred and is continuing, and DTC requests the issuance of certificated notes; or



we determine not to have the notes represented by a global note.

Neither we nor the trustee will be liable for any delay by DTC, its nominee or any direct or indirect participant in identifying the
beneficial owners of the notes. We and the trustee may conclusively rely on, and will be protected in relying on, instructions from DTC or its nominee for all purposes, including with respect to the registration and delivery, and the respective
principal amounts, of the certificated notes to be issued.

Certain Definitions

Beneficial Owner has the meaning assigned to such term in Rule 13d-3 and Rule 13d-5 under the Exchange Act, except that in
calculating the beneficial ownership of any particular person (as that term is used in Section 13(d)(3) of the Exchange Act), such person will be deemed to have beneficial ownership of all securities that such
person has the right to acquire by conversion or exercise of other securities, whether such right is currently exercisable or is exercisable only after the passage of time. The terms Beneficially Owns and Beneficially
Owned have a corresponding meaning.

Board of Directors means:

1)

with respect to a corporation, the board of directors of the corporation or any committee thereof duly authorized to act for the corporation;

2)

with respect to a partnership, the Board of Directors of the general partner of the partnership;

3)

with respect to a limited liability company, the managing member or members or any controlling committee of managing members thereof; and

4)

with respect to any other Person, the board or committee of such Person serving a similar function.

Change of Control means the occurrence of any of the following:

1)

the direct or indirect sale, lease, transfer, conveyance or other disposition (other than by way of merger or consolidation), in one or a series of related
transactions, of all or substantially all of the properties or assets of Owens Corning and its Subsidiaries taken as a whole to any person (as that term is used in Section 13(d) of the Exchange Act);

2)

the adoption of a plan relating to the liquidation or dissolution of Owens Corning;

the consummation of any transaction (including, without limitation, any merger or consolidation), the result of which is that any person (as defined above)
becomes the Beneficial Owner, directly or indirectly, of more than 50% of the Voting Stock of Owens Corning, measured by voting power rather than number of shares; or

4)

the first day on which a majority of the members of the Board of Directors of Owens Corning are not Continuing Directors.

Change of Control Offer has the meaning assigned to that term in the indenture governing the notes.

Change of Control Repurchase Event means the occurrence of a Change of Control and a Ratings Downgrade.

Comparable Treasury Issue means the United States Treasury security selected by the Quotation Agent as having a maturity
comparable to the remaining term of the notes to be redeemed that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate notes of comparable maturity to the remaining term
of the notes.

Comparable Treasury Price means, with respect to any redemption date, (i) the average of four
Reference Treasury Dealer Quotations for such redemption date, after excluding the highest and lowest such Reference Treasury Dealer Quotations, or (ii) if the Quotation Agent obtains fewer than four such Reference Treasury Dealer Quotations,
the average of all such quotations.

Continuing Directors means, as of any date of determination, any member of
the Board of Directors of Owens Corning who:

1)

was a member of such Board of Directors on the date of the indenture; or

2)

was nominated for election or elected to such Board of Directors with the approval of a majority of the Continuing Directors who were members of such Board of Directors
at the time of such nomination or election.

Credit Agreement means the Credit Agreement dated as of
October 31, 2006, among Owens Corning, the lending institutions party thereto and Citibank, N.A., as administrative agent, and any related notes, guarantees, collateral documents, instruments and agreements executed in connection therewith, and
in each case, as amended, restated, modified, renewed, refunded, replaced (whether upon termination or otherwise) or refinanced in whole or in part from time to time.

Officers Certificate means a certificate signed by two officers or by an officer and either an assistant treasurer or an assistant secretary of Owens Corning.

Quotation Agent means a Reference Treasury Dealer appointed by us.

Rating Agency means each of Moodys Investors Service Inc. and Standard & Poors Ratings Services, a
division of The McGraw-Hill Companies, Inc., or any of their successors.

Ratings Downgrade means when, at the
time of a Change of Control, the notes carry:

1)

an investment grade credit rating (BBB-/Baa3, or equivalent, or better) from both Rating Agencies, and such rating from both Rating Agencies is within 60 days of the
occurrence of the Change of Control (which period shall be extended so long as the rating of the notes is under publicly announced consideration for possible downgrade by either Rating Agency) either downgraded to a non-investment grade credit
rating (BB+/Ba1 or equivalent, or worse) or withdrawn and is not within such period subsequently (in the case of a downgrade) upgraded to an investment grade credit rating or (in the case of a withdrawal) replaced by an investment grade credit
rating;

a non-investment grade credit rating (BB+/Ba1, or equivalent, or worse) from both Rating Agencies, and such rating from both Rating Agencies is within 60 days of the
occurrence of the Change of Control (which period shall be extended so long as the rating of the notes is under publicly announced consideration for possible downgrade by either Rating Agency) downgraded by one or more notches (for illustration, Ba1
to Ba2 being one notch) and is not within such period subsequently upgraded to its earlier credit rating or better by both Rating Agencies;

3)

both (A) an investment grade credit rating (BBB-/Baa3, or equivalent, or better) from one Rating Agency, and such rating is within 60 days of the occurrence of the
Change of Control (which period shall be extended so long as the rating of the notes is under publicly announced consideration for possible downgrade by either Rating Agency) either downgraded to a non-investment grade credit rating (BB+/Ba1, or
equivalent, or worse) or withdrawn and is not within such period subsequently (in the case of a downgrade) upgraded to an investment grade credit rating by such Rating Agency or (in the case of a withdrawal) replaced by an investment grade credit
rating from such Rating Agency and (B) a non-investment grade credit rating (BB+/Ba1, or equivalent, or worse) from one Rating Agency, and such rating is within 60 days of the occurrence of the Change of Control (which period shall be extended
so long as the rating of the notes is under publicly announced consideration for possible downgrade by either Rating Agency) downgraded by one or more notches (for illustration, Ba1 to Ba2 being one notch) and is not within such period subsequently
upgraded to its earlier credit rating or better by such Rating Agency;

4)

both (A) an investment grade credit rating (BBB-/Baa3, or equivalent, or better) from one Rating Agency, and such rating is within 60 days of the occurrence of the
Change of Control (which period shall be extended so long as the rating of the notes is under publicly announced consideration for possible downgrade by either Rating Agency) either downgraded to a non-investment grade credit rating (BB+/Ba1, or
equivalent, or worse) or withdrawn and is not within such period subsequently (in the case of a downgrade) upgraded to an investment grade credit rating by such Rating Agency or (in the case of a withdrawal) replaced by an investment grade credit
rating from such Rating Agency and (B) no credit rating from one Rating Agency, and such Rating Agency does not assign within 60 days of the occurrence of the Change of Control an investment grade credit rating to the notes;

5)

both (A) a non-investment grade credit rating (BB+/Ba1, or equivalent, or worse) from one Rating Agency, and such rating is within 60 days of the occurrence of the
Change of Control (which period shall be extended so long as the rating of the notes is under publicly announced consideration for possible downgrade by either Rating Agency) downgraded by one or more notches (for illustration, Ba1 to Ba2 being one
notch) and is not within such period subsequently upgraded to its earlier credit rating or better by such Rating Agency and (B) no credit rating from one Rating Agency, and such Rating Agency does not assign within 60 days of the occurrence of
the Change of Control an investment grade credit rating to the notes; or

6)

no credit rating from either Rating Agency and both Rating Agencies do not assign within 60 days of the occurrence of the Change of Control an investment grade credit
rating to the notes;

and in making the relevant decision(s) referred to above to downgrade or withdraw such
ratings, as applicable, the relevant Rating Agency announces publicly or confirms in writing to Owens Corning that such decision(s) resulted, in whole or in part, from the occurrence of the Change of Control.

Reference Treasury Dealer means (i) each of Merrill Lynch, Pierce, Fenner & Smith Incorporated, Citigroup
Global Markets Inc., J.P. Morgan Securities LLC and a Primary Treasury Dealer (as defined herein) selected by Wells Fargo Securities, LLC, or their respective successors or affiliates, and at least one other primary U.S. Government securities dealer
in New York City (a Primary Treasury Dealer) selected by us; provided, however, that if any of the foregoing shall cease to be a Primary Treasury Dealer, we will substitute therefor another Primary Treasury Dealer; and (ii) any
other Primary Treasury Dealer selected by us.

Reference Treasury Dealer Quotations means, with respect to each Reference
Treasury Dealer and any redemption date, the average, as determined by us, of the bid and asked prices for the Comparable Treasury Issue (expressed in each case as a percentage of its principal amount) quoted in writing to the Quotation Agent by
such Reference Treasury Dealer at 5:00 p.m., New York City time, on the third Business Day preceding such redemption date.

Subsidiary means, with respect to any specified Person:

1)

any corporation, association or other business entity of which more than 50% of the total voting power of shares of Capital Stock entitled (without regard to the
occurrence of any contingency and after giving effect to any voting agreement or stockholders agreement that effectively transfers voting power) to vote in the election of directors, managers or trustees of the corporation, association or
other business entity is at the time owned or controlled, directly or indirectly, by that Person or one or more of the other Subsidiaries of that Person (or a combination thereof); and

2)

any partnership (a) the sole general partner or the managing general partner of which is such Person or a Subsidiary of such Person or (b) the only general
partners of which are that Person or one or more Subsidiaries of that Person (or any combination thereof).

Subsidiary Guarantee means the guarantee by each Guarantor of Owens Cornings obligations under the indenture and the
notes, executed pursuant to the provisions of the indenture.

Treasury Rate means, with respect to any redemption
date, the rate per annum equal to the semi-annual equivalent yield to maturity of the Comparable Treasury Issue, assuming a price for the Comparable Treasury Issue (expressed as a percentage of its principal amount) equal to the Comparable Treasury
Price for such redemption date.

Voting Stock of any specified Person as of any date means the Capital Stock of
such Person that is at the time entitled to vote in the election of the Board of Directors of such Person.

The following is a general discussion of the material U.S. federal income tax consequences of the acquisition, ownership,
and disposition of the notes to beneficial owners of the notes. This discussion is based upon the Internal Revenue Code of 1986, as amended (the Internal Revenue Code), the U.S. Treasury regulations promulgated thereunder, administrative
pronouncements and judicial decisions, all as of the date hereof and all of which are subject to change or differing interpretation, possibly on a retroactive basis.

This discussion applies only to beneficial owners that acquire the notes in connection with their initial issuance, at their initial offering price and hold the notes as capital assets within
the meaning of section 1221 of the Internal Revenue Code. This discussion does not address all aspects of U.S. federal income taxation that might be important to particular investors in light of their individual circumstances or the U.S. federal
income tax consequences applicable to special classes of taxpayers, such as banks and other financial institutions, insurance companies, real estate investment trusts, regulated investment companies, tax-exempt organizations, cooperatives,
partnerships (or entities or arrangements properly classified as partnerships for U.S. federal income tax purposes) or other pass-through entities, dealers in securities or currencies, traders in securities that elect to use a mark-to-market method
of accounting, persons liable for U.S. federal alternative minimum tax, U.S. Holders (as defined below) whose functional currency is not the U.S. dollar, former citizens or residents of the United States, and persons holding the notes as part of a
hedging or conversion transaction or a straddle. The discussion does not address any foreign, state, local or non-income tax consequences of the acquisition, ownership or disposition of the notes to beneficial owners of the notes.

As used in this prospectus supplement, the term U.S. Holder means a beneficial owner of a note who or that is for U.S.
federal income tax purposes:



a citizen or individual resident of the United States;



a corporation (or other entity properly classified as a corporation for U.S. federal income tax purposes) created or organized in or under the laws of
the United States, any State within the United States, or the District of Columbia;



an estate, the income of which is subject to U.S. federal income taxation regardless of its source; or



a trust, if (i) a U.S. court is able to exercise primary supervision over the trusts administration and one or more United States
persons (as defined in the Internal Revenue Code) have the authority to control all substantial decisions of the trust, or (ii) in the case of a trust that was treated as a domestic trust under the laws in effect before 1997, a valid
election is in place under applicable U.S. Treasury regulations to treat such trust as a domestic trust.

The term Non-U.S. Holder means any beneficial owner of a note who or that is not a U.S. Holder and is not a partnership or
other entity or arrangement properly classified as a partnership for U.S. federal income tax purposes. For the purposes of this prospectus supplement, U.S. Holders and Non-U.S. Holders are referred to collectively as Holders.

If a partnership or other entity or arrangement properly classified as a partnership for U.S. federal income tax purposes is a beneficial
owner of a note, the tax treatment of a partner will generally depend upon the status of the partner and the activities of the partnership. Such entities and partners of such entities should consult their own tax advisors about the U.S. federal
income and other tax consequences of the acquisition, ownership, and disposition of a note.

This discussion is for general
purposes only. Holders should consult their own tax advisors regarding the application of the U.S. federal income tax laws to their particular situations and the consequences under federal estate or gift tax laws, as well as foreign, state, or local
laws and tax treaties, and the possible effects of changes in tax laws.

A U.S. Holder generally must include interest paid on the notes as ordinary income at the time it is received or accrued, in accordance with the U.S. Holders regular method of accounting for U.S.
federal income tax purposes. If, however, the stated principal amount of the notes exceeds the issue price by more than a de minimis amount (as set forth in the applicable Treasury regulations), a U.S. Holder (regardless of its method of tax
accounting) will be required to include such excess in income as original issue discount as it accrues in accordance with a constant yield method based on a compounding of interest before the receipt of cash payments attributable to this income. It
is not expected that the stated principal amount of the notes will exceed the issue price by more than a de minimis amount.

Change of Control Premium and Optional Redemption Amount

In certain circumstances, we may be obligated to pay a change of control premium on the notes (as described above under Description
of the NotesChange of Control). In addition, we may redeem the notes in whole at any time or in part from time to time at a redemption price equal to the greater of (i) 100% of the principal amount of the notes to be redeemed, and
(ii) as determined by the Quotation Agent, the sum of the present values of the remaining scheduled payments of principal and interest on the notes being redeemed (excluding any portion of such payments of interest accrued as of the date of
redemption), discounted to the date of redemption on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Rate, plus basis points,
plus, in each case, accrued and unpaid interest thereon to the date of redemption (the optional redemption amount) (as described above under Description of the NotesOptional Redemption). These events may implicate the
provisions of Treasury regulations relating to contingent payment debt instruments. We intend to take the position that the contingency that such events will occur is remote or incidental (within the meaning of
applicable Treasury regulations) and therefore that the notes are not subject to the rules governing contingent payment debt instruments. Under our position, the change of control premium or the optional redemption amount, as the case may be, will
be taxable to a U.S. Holder as additional ordinary income when received or accrued, according to such U.S. Holders method of accounting for U.S. federal income tax purposes. If our position were found to be incorrect and the notes were deemed
to be contingent payment debt instruments, a U.S. Holder might, among other things, be required to treat any gain recognized on the sale or other disposition of a note as ordinary income rather than capital gain and might be required to report the
change of control premium or the optional redemption amount, as the case may be, as income when it accrues or becomes fixed, even if such U.S. Holder is a cash method taxpayer.

Sale, Exchange or Redemption of the Notes

Upon the sale, exchange, redemption or other taxable disposition of the notes, a U.S. Holder generally will recognize gain or loss equal to the difference, if any, between (i) the amount realized
upon the sale, exchange, redemption or other taxable disposition of the notes, other than amounts attributable to accrued interest which would be treated as interest described above in Interest (which will be taxed as ordinary
interest income to the extent such interest has not been previously included in income), and (ii) the U.S. Holders adjusted tax basis in the notes. The amount realized by a U.S. Holder is the sum of cash plus the fair market value of all
other property received on such sale, exchange, redemption or other taxable disposition. A U.S. Holders adjusted tax basis in the notes generally will be its cost for the notes.

The gain or loss a U.S. Holder recognizes on the sale, exchange, redemption or other taxable disposition of the notes generally will be
capital gain or loss. Such gain or loss generally will be long-term capital gain or loss if a U.S. Holder has held the notes for more than 12 consecutive months. For individuals, long-term capital gains are currently taxed at a lower rate than
ordinary income. The deductibility of capital losses is subject to limitations. A U.S. Holder should consult its own tax advisor regarding the deductibility of capital losses in its particular circumstances.

Beginning in 2013, certain U.S. Holders that are individuals, estates or trusts will be subject to a 3.8% tax on all or a portion of their
net investment income, which may include all or a portion of their interest income and net gains from the disposition of a note. If you are a U.S. Holder that is an individual, estate or trust, you are urged to consult your tax advisors
regarding the applicability of the Medicare Tax to your income.

Backup Withholding and Information Reporting

In general, a U.S. Holder that is not an exempt recipient will be subject to U.S. federal backup
withholding tax at the applicable rate (currently 28%) with respect to payments on the notes and the proceeds of a sale, exchange, redemption or other taxable disposition of the notes, unless the U.S. Holder provides its taxpayer identification
number to the paying agent and certifies, under penalties of perjury, that it is not subject to backup withholding on an Internal Revenue Service Form W-9 (Request for Taxpayer Identification Number and Certification) and otherwise complies with the
applicable requirements of the backup withholding rules. Backup withholding is not an additional tax. The amount of any backup withholding from a payment to a U.S. Holder may be allowed as a credit against such U.S. Holders U.S. federal income
tax liability and may entitle such U.S. Holder to a refund, provided the required information is furnished to the Internal Revenue Service in a timely manner. In addition, payments on the notes made to, and the proceeds of a sale or other taxable
disposition by, a U.S. Holder that is not an exempt recipient generally will be subject to information reporting requirements.

U.S.
Federal Income Taxation of Non-U.S. Holders

Payments of Interest

Subject to the discussion below under Backup Withholding and Information Reporting, a Non-U.S. Holder generally will not
be subject to U.S. federal withholding tax on interest paid on the notes so long as:



the Non-U.S. Holder does not actually or constructively own 10% or more of the total combined voting power of all of our stock entitled to vote;



the Non-U.S. Holder is not a controlled foreign corporation that is related to us, actually or by attribution, through stock ownership;



the Non-U.S. Holder is not a bank receiving the interest pursuant to a loan agreement entered into in the ordinary course of the Non-U.S. Holders
trade or business; and either



(i) the Non-U.S. Holder certifies under penalties of perjury on Form W-8BEN (Certificate of Foreign Status of Beneficial Owner for United States Tax
Withholding) or a suitable substitute form that it is not a United States person (as defined in the Internal Revenue Code), and provides its name and address, and U.S. taxpayer identification number, if any, or (ii) a securities clearing
organization, bank or other financial institution that holds customers securities in the ordinary course of its trade or business and holds the notes on behalf of the Non-U.S. Holder certifies under penalties of perjury that the certification
referred to in clause (i) has been received from the Non-U.S. Holder and furnishes to us a copy thereof.

A Non-U.S. Holder that does not qualify for exemption from withholding as described above generally will be subject to withholding of
U.S. federal income tax at a rate of 30% on payments of interest on the notes. A Non-U.S. Holder may be entitled to the benefits of an income tax treaty under which interest on the notes is subject to a reduced rate of U.S. withholding tax or is
exempt from U.S. withholding tax, provided the Non-U.S. Holder furnishes us a properly completed and executed Internal Revenue Service Form W-8BEN claiming the reduction or exemption and the Non-U.S. Holder complies with any other applicable
procedures.

Special rules regarding exemption from, or reduced rates of, U.S. withholding tax may apply in the case of notes
held by partnerships or certain types of trusts. Partnerships and trusts that are prospective purchasers should consult their tax advisors regarding special rules that may be applicable in their particular circumstances.

Generally, any gain recognized by a Non-U.S. Holder on the sale, exchange, redemption or other taxable disposition of a note (other than
amounts attributable to accrued and unpaid interest, which will be treated as described under Payments of Interest above) will be exempt from U.S. federal income and withholding tax, unless:



the gain is effectively connected with the Non-U.S. Holders conduct of a trade or business within the United States (or, if a treaty applies, is
attributable to a permanent establishment maintained by the Non-U.S. Holder in the United States); or



the Non-U.S. Holder is an individual who is present in the United States for 183 days or more during the taxable year, and certain other conditions are
met.

Effectively Connected Income

If interest, gain or other income recognized by a Non-U.S. Holder on a note is effectively connected with the Non-U.S.
Holders conduct of a trade or business within the United States (and, if a treaty applies, is attributable to a permanent establishment maintained by the Non-U.S. Holder in the United States), the Non-U.S. Holder will not be subject to the
withholding tax discussed above if the Non-U.S. Holder provides us with a properly completed and executed Internal Revenue Service Form W-8ECI (Certificate of Foreign Persons Claim That Income Is Effectively Connected With the Conduct of a
Trade or Business in the United States), but the Non-U.S. Holder generally will be subject to U.S. federal income tax on such interest, gain or other income as if it were a United States person (as defined in the Internal Revenue Code). In addition
to such U.S. federal income tax, if the Non-U.S. Holder is a corporation, it may be subject to an additional branch profits tax.

Recent Legislation

On March 18, 2010, the Hiring Incentives to
Restore Employment Act (the HIRE Act) was signed into law. The HIRE Act will generally impose a withholding tax of 30% on interest income from, and the gross proceeds from a disposition of, notes paid to certain foreign entities unless
various information reporting requirements are satisfied. This would generally apply in the case of debt obligations held through intermediaries who do not agree to satisfy such information reporting requirements. The IRS has released preliminary
guidance indicating that the HIRE Act generally will apply to certain withholdable payments made after December 31, 2013 in the case of interest and December 31, 2014 in the case of gross proceeds arising from the disposition of debt
instruments. However, the new withholding requirements generally would not apply to debt instruments issued on or before December 31, 2012, unless such debt instruments are deemed to be reissued after December 31, 2012 for federal income
tax purposes.

Non-U.S. Holders are encouraged to consult with their own tax advisors regarding the possible implications of
this recently enacted legislation on their investment in the notes.

Backup Withholding and Information Reporting

We must report annually to the Internal Revenue Service and to a Non-U.S. Holder the amount of interest paid to the
Non-U.S. Holder and the tax withheld from those payments. These reporting requirements apply regardless of whether U.S. withholding tax on such payments was reduced or eliminated by any applicable tax treaty or otherwise. Copies of the information
returns reporting those payments and the amounts withheld may also be made available to the tax authorities in the country where a Non-U.S. Holder is a resident under the provisions of an applicable income tax treaty or agreement.

Under some circumstances, U.S. Treasury regulations require backup withholding and additional information reporting on payments of
interest and other reportable payments. Such backup withholding and additional information reporting will not apply to payments on the notes made by us or our paying agent to a Non-U.S. Holder if the certification described above under
Payments of Interest is received from the Non-U.S. Holder.

Backup withholding and information reporting generally will not apply to payments of
proceeds from the sale or other disposition of a note made to a Non-U.S. Holder by or through the foreign office of a broker. However, information reporting requirements, and possibly backup withholding, will apply if such broker is, for U.S.
federal income tax purposes, a United States person (as defined in the Internal Revenue Code) or has certain other enumerated connections with the United States, unless such broker has documentary evidence in its records that the Non-U.S. Holder is
not a United States person (as defined in the Internal Revenue Code) and certain other conditions are met, or the Non-U.S. Holder otherwise establishes an exemption. Payments of proceeds from the sale or other disposition of a note made to a
Non-U.S. Holder by or through the U.S. office of a broker are subject to information reporting and backup withholding at the applicable rate unless the Non-U.S. Holder certifies, under penalties of perjury, that it is not a United States person (as
defined in the Internal Revenue Code) and it satisfies certain other conditions or otherwise establishes an exemption. Backup withholding is not an additional tax. A Non-U.S. Holder may obtain a refund or credit against its U.S. federal income tax
liability of any amounts withheld under the backup withholding rules, provided the required information is furnished to the Internal Revenue Service in a timely matter.

Non-U.S. Holders should consult their tax advisors regarding the application of information reporting and backup withholding in their particular situations, the availability of an exemption therefrom, and
the procedures for obtaining such an exemption, if available.

The material U.S. federal income tax considerations set
forth above are included for general information only and may not be applicable depending upon a Holders particular situation. Prospective purchasers of the notes should consult their own tax advisors with respect to the tax consequences to
them of the acquisition, ownership and disposition of the notes, including the tax consequences under state, local, estate, foreign and other tax laws and tax treaties and the possible effects of changes in U.S. or other tax laws.

Merrill Lynch, Pierce, Fenner & Smith Incorporated, Citigroup Global Markets Inc., J.P. Morgan Securities LLC and Wells Fargo
Securities, LLC are acting as representatives of each of the underwriters named below. Subject to the terms and conditions set forth in a firm commitment underwriting agreement among us, the guarantors and the underwriters, we have agreed to sell to
the underwriters, and each of the underwriters has agreed, severally and not jointly, to purchase from us, the principal amount of notes set forth opposite its name below.

Underwriter

Principal Amountof Notes

Merrill Lynch, Pierce, Fenner & Smith

Incorporated

$

Citigroup Global Markets Inc.

J.P. Morgan Securities LLC

Wells Fargo Securities, LLC

Total

$

Subject to the terms and conditions set forth in the underwriting agreement, the underwriters have
agreed, severally and not jointly, to purchase all of the notes sold under the underwriting agreement if any of these notes are purchased. If an underwriter defaults, the underwriting agreement provides that the purchase commitments of the
nondefaulting underwriters may be increased or the underwriting agreement may be terminated.

We and the guarantors have
agreed to indemnify the underwriters and their controlling persons against certain liabilities in connection with this offering, including liabilities under the Securities Act, or to contribute to payments the underwriters may be required to make in
respect of those liabilities.

The underwriters are offering the notes, subject to prior sale, when, as and if issued to and
accepted by them, subject to approval of legal matters by their counsel, and other conditions contained in the underwriting agreement, such as the receipt by the underwriters of officers certificates and legal opinions. The underwriters
reserve the right to withdraw, cancel or modify offers to the public and to reject orders in whole or in part.

Commissions and Discounts

The representatives have advised us that the underwriters propose initially to offer the notes to the public at the public
offering price set forth on the cover page of this prospectus supplement and to certain dealers at such price less a concession not in excess of % of the principal amount of the notes. After the initial offering, the public
offering price, concession or any other term of the offering may be changed.

The following table shows the underwriting
discount that we will pay to the underwriters in connection with the offering of the notes:

Per note

%

Total

$

The expenses of the offering, not including the underwriting discount, are estimated at
$ million and are payable by us.

New Issue of Notes

The notes are a new issue of securities with no established trading market. We do not intend to apply for listing of the notes on any
national securities exchange or for inclusion of the notes on any automated dealer

quotation system. We have been advised by the underwriters that they presently intend to make a market in the notes after completion of the offering. However, they are under no obligation to do
so and may discontinue any market-making activities at any time without any notice. We cannot assure the liquidity of the trading market for the notes or that an active public market for the notes will develop. If an active public trading market for
the notes does not develop, the market price and liquidity of the notes may be adversely affected. If the notes are traded, they may trade at a discount from their initial offering price, depending on prevailing interest rates, the market for
similar securities, our operating performance and financial condition, general economic conditions and other factors.

No Sales of Similar
Securities

We and the guarantors have agreed that we and the guarantors will not, through and including the date of
closing of this offering, without first obtaining the prior written consent of the representatives, directly or indirectly, issue, sell, offer to contract or grant any option to sell, pledge, transfer or otherwise dispose of, any debt securities or
securities exchangeable for or convertible into debt securities, except for the notes sold to the underwriters pursuant to the underwriting agreement.

Short Positions

In connection with the offering, the underwriters may
purchase and sell the notes in the open market. These transactions may include short sales and purchases on the open market to cover positions created by short sales. Short sales involve the sale by the underwriters of a greater principal amount of
notes than they are required to purchase in the offering. The underwriters must close out any short position by purchasing notes in the open market. A short position is more likely to be created if the underwriters are concerned that there may be
downward pressure on the price of the notes in the open market after pricing that could adversely affect investors who purchase in the offering.

Similar to other purchase transactions, the underwriters purchases to cover the syndicate short sales may have the effect of raising or maintaining the market price of the notes or preventing or
retarding a decline in the market price of the notes. As a result, the price of the notes may be higher than the price that might otherwise exist in the open market.

Neither we nor any of the underwriters make any representation or prediction as to the direction or magnitude of any effect that the transactions described above may have on the price of the notes. In
addition, neither we nor any of the underwriters make any representation that the representatives will engage in these transactions or that these transactions, once commenced, will not be discontinued without notice.

Conflicts of Interest

As described under Use of Proceeds in this prospectus supplement, we intend to use a portion of the net proceeds of this
offering to fund the repurchase of our 2016 senior notes and 2019 senior notes in the tender offers, including the repayment of accrued interest and any applicable tender premiums. The remaining net proceeds will be used (i) first, to repay
borrowings under our $800 million revolving credit facility and (ii) second, for general corporate purposes. Certain affiliates of the underwriters are lenders under our revolving credit facility and will receive some of the net proceeds from
this offering. In the event that any of Merrill Lynch, Pierce, Fenner & Smith Incorporated, J.P. Morgan Securities LLC or Wells Fargo Securities, LLC, together with their respective affiliates, receive at least 5% of the net proceeds of this
offering, such underwriters will be deemed to have a conflict of interest within the meaning of FINRA Rule 5121. However, in accordance with FINRA Rule 5121, no qualified independent underwriter is required because the notes
are investment grade-rated by one or more nationally recognized statistical rating agencies.

Some of the underwriters and their affiliates have engaged in, and may in the future engage in, investment banking and other commercial dealings in the ordinary course of business with us or our
affiliates. They have received, or may in the future receive, customary fees and commissions for these transactions. Certain affiliates of the underwriters are lenders under our revolving credit facility. In addition, an affiliate of Wells Fargo
Securities, LLC acts as administrative agent, an affiliate of Merrill Lynch, Pierce, Fenner & Smith Incorporated acts as syndication agent and an affiliate of J.P. Morgan Securities LLC acts as documentation agent under the facility.
Affiliates of Merrill Lynch, Pierce, Fenner & Smith Incorporated and Wells Fargo Securities, LLC act as joint lead arrangers and joint book managers under the facility. Merrill Lynch, Pierce, Fenner & Smith Incorporated and Wells
Fargo Securities, LLC are acting as dealer managers and solicitation agents in connection with the tender offers.

In
addition, in the ordinary course of their business activities, the underwriters and their affiliates may make or hold a broad array of investments and actively trade debt and equity securities (or related derivative securities) and financial
instruments (including bank loans) for their own account and for the accounts of their customers. Such investments and securities activities may involve securities and/or instruments of ours or our affiliates. If any of the underwriters or their
affiliates has a lending relationship with us, certain of those underwriters or their affiliates routinely hedge, and certain other of those underwriters or their affiliates may hedge, their credit exposure to us consistent with their customary risk
management policies. Typically, those underwriters and their affiliates would hedge such exposure by entering into transactions which consist of either the purchase of credit default swaps or the creation of short positions in our securities,
including potentially the notes offered hereby. Any such credit default swaps or short positions could adversely affect future trading prices of the notes offered hereby. The underwriters and their affiliates may also make investment recommendations
and/or publish or express independent research views in respect of such securities or financial instruments and may hold, or recommend to clients that they acquire, long and/or short positions in such securities and instruments.

Notice to Prospective Investors in the European Economic Area

In relation to each member state of the European Economic Area which has implemented the Prospectus Directive (each, a Relevant Member State), each underwriter has represented that with effect
from and including the date on which the Prospectus Directive is implemented in that Relevant Member State (the Relevant Implementation Date) it has not made and will not make an offer of notes which are the subject of the offering
contemplated by this prospectus supplement to the public in that Relevant Member State other than:

A.

to any legal entity which is a qualified investor as defined in the Prospectus Directive;

B.

to fewer than 100 or, if the Relevant Member State has implemented the relevant provision of the 2010 PD Amending Directive, 150, natural or legal persons (other than
qualified investors as defined in the Prospectus Directive), as permitted under the Prospectus Directive, subject to obtaining the prior consent of the relevant underwriter or underwriters nominated by us for any such offer ; or

C.

in any other circumstances falling within Article 3(2) of the Prospectus Directive;

provided that no such offer of notes shall require us or any underwriter to publish a prospectus pursuant to Article 3 of the Prospectus
Directive.

For purposes of this provision, the expression an offer of notes to the public in relation to any
notes in any Relevant Member State means the communication in any form and by any means of sufficient information on the terms of the offer and the notes to be offered so as to enable an investor to decide to purchase or subscribe the notes, as the
same may be varied in that Relevant Member State by any measure implementing the Prospectus Directive in the Relevant Member State and the expression Prospectus Directive means Directive 2003/71/EC (and amendments thereto, including the
2010 PD Amending Directive, to the extent implemented in the Relevant Member States) and includes any relevant implementing measure in the Relevant Member State and the expression 2010 PD Amending Directive means Directive 2010/73/EU.

it has only communicated or caused to be communicated and will only communicate or cause to be communicated an invitation or inducement to engage in investment activity
(within the meaning of Section 21 of the Financial Services and Markets Act 2000 (the FSMA) received by it in connection with the issue or sale of the notes in circumstances in which Section 21(1) of the FSMA does not apply to
us; and

B.

it has complied and will comply with all applicable provisions of the FSMA with respect to anything done by it in relation to the notes in, from or otherwise involving
the United Kingdom.

The validity of the notes offered by this prospectus supplement will be passed upon for us by Sidley Austin LLP, Chicago, Illinois.
Certain legal matters as to the guarantee given by Soltech, Inc. will be passed upon by Stites & Harbison, PLLC, Louisville, Kentucky, and certain legal matters as to the guarantee given by CDC Corporation will be passed upon by Reinhart
Boerner Van Deuren s.c., Milwaukee, Wisconsin. Certain legal matters relating to this offering will be passed upon for the underwriters by Skadden, Arps, Slate, Meagher & Flom LLP, New York, New York.

EXPERTS

The consolidated financial statements of Owens Corning and its subsidiaries and managements assessment of the effectiveness of internal control over financial reporting (which is included in
Managements Report on Internal Control over Financial Reporting) incorporated in this prospectus supplement and the accompanying prospectus by reference to the Annual Report on Form 10-K of Owens Corning for the year ended December 31,
2011, have been so incorporated in reliance on the report of PricewaterhouseCoopers LLP, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

We may offer
debt securities and related guarantees from time to time in one or more series. We will provide specific terms of any offering of these debt securities and related guarantees, together with the terms of the offering, the initial public offering
price and our net proceeds from the sale thereof, in supplements to this prospectus. You should read this prospectus and any prospectus supplement, as well as the documents incorporated and deemed to be incorporated by reference in this prospectus
and any prospectus supplement, carefully before you invest.

We may sell these debt securities and related guarantees on a
continuous or delayed basis directly, through agents, dealers or underwriters as designated from time to time, or through a combination of these methods. We reserve the sole right to accept, and together with any agents, dealers and underwriters,
reserve the right to reject, in whole or in part, any proposed purchase of debt securities. If any agents, dealers or underwriters are involved in the sale of any debt securities and related guarantees, the applicable prospectus supplement will set
forth any applicable commissions or discounts. Our net proceeds from the sale of debt securities and related guarantees will be the initial public offering price of those debt securities less the applicable discount, in the case of an offering made
through an underwriter, or the purchase price of those debt securities less the applicable commission, in the case of an offering through an agent, and, in each case, less other expenses payable by us in connection with the issuance and distribution
of those debt securities and related guarantees.

Our principal executive offices are located at One Owens Corning Parkway,
Toledo, Ohio 43659, and our telephone number at that address is (419) 248-8000. Our principal website is located at www.owenscorning.com. Information on our website is not incorporated into this prospectus.

Investing in our securities involves risks. You should carefully consider the information referred to under the heading Risk
Factors on page 4 of this prospectus.

Neither the Securities and Exchange Commission nor any state
securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

This prospectus incorporates by reference important business and financial information about us that is not included in or delivered
with this document. This information, other than exhibits to documents that are not specifically incorporated by reference in this prospectus, is available to you without charge upon written or oral request to: Owens Corning, One Owens Corning
Parkway, Toledo, Ohio 43659, Attention: Corporate Secretary, (419) 248-8000.

This prospectus is part of an automatic
shelf registration statement that we filed with the Securities and Exchange Commission, or SEC, as a well-known seasoned issuer as defined in Rule 405 under the Securities Act of 1933, or the Securities Act.
Under the automatic shelf process, we may offer and sell, from time to time, the debt securities described in this prospectus or in any applicable prospectus supplement in one or more offerings. This prospectus only provides you with a general
description of the debt securities we may offer. Each time we offer and sell debt securities, we will provide a prospectus supplement containing specific information about the terms of those debt securities. The prospectus supplement may also add,
update or change information contained in this prospectus. Before you make any investment decision, you should read both this prospectus and any prospectus supplement, together with the documents incorporated and deemed to be incorporated by
reference in this prospectus and the additional information described below under the heading Where You Can Find More Information.

You should rely only on the information contained in this prospectus and the accompanying prospectus supplement, including the information incorporated or deemed to be incorporated by reference herein or
any free writing prospectus that we prepare and distribute. We have not authorized anyone to provide you with information different from that contained in or incorporated by reference into this prospectus, the accompanying prospectus supplement or
any such free writing prospectus.

This prospectus does not constitute an offer to sell or a solicitation of an offer to buy
by anyone in any jurisdiction in which such offer or solicitation is not authorized, or in which the person is not qualified to do so or to any person to whom it is unlawful to make such offer or solicitation. Neither the delivery of this prospectus
nor any sale hereunder shall, under any circumstances, create any implication that there has been no change in our affairs since the date hereof, that the information contained herein is correct as of any time subsequent to its date, or that any
information incorporated or deemed to be incorporated by reference herein is correct as of any time subsequent to its date.

The exhibits to our registration statement contain the full text of certain agreements and other important documents we have summarized
in this prospectus. Since these summaries may not contain all the information that you may find important in deciding whether to purchase the debt securities we offer, you should review the full text of these documents. The registration statement
and the exhibits can be obtained from the SEC as indicated under the heading Where You Can Find More Information.

In this prospectus, unless otherwise expressly set forth or as the context otherwise indicates, the terms Owens Corning,
Company, we, our and us refer to Owens Corning, a Delaware corporation, and its subsidiaries.

We file
annual, quarterly and current reports, proxy statements and other information with the SEC. The SEC allows us to incorporate by reference into this prospectus the information we file with the SEC, which means that we can disclose
important information to you by referring you to those documents. The information incorporated by reference is considered to be part of this prospectus, and information that we file later with the SEC will automatically update and supersede
this information. SEC rules and regulations also permit us to furnish rather than file certain reports and information with the SEC. Any such reports or information which we furnish or have furnished
shall not be deemed to be incorporated by reference into or otherwise become a part of this prospectus, regardless of when furnished to the SEC. We incorporate by reference the following documents we have already filed with the SEC (file number
1-33100) and any future filings that we will make with the SEC under Sections 13(a), 13(c), 14, or 15(d) of the Securities Exchange Act of 1934, or the Exchange Act (other than any portion of such filings that are furnished under
applicable SEC rules rather than filed):



Annual Report on Form 10-K for the year ended December 31, 2011; and



Definitive Proxy Statement on Schedule 14A filed with the SEC on March 16, 2011.

Our SEC filings are available free of charge through our Internet website at www.owenscorning.com as soon as reasonably
practicable after we electronically file these materials with the SEC. You may access these SEC filings on our website. However, the information on our Internet site is not part of this prospectus or any accompanying prospectus supplement or other
offering materials. You may also request a copy of our SEC filings at no cost, by writing or telephoning us at:

Owens Corning

One Owens Corning Parkway

Toledo, OH 43659

Attention: Corporate Secretary

Telephone: (419) 248-8000

Our SEC filings are also available at the SECs Web site at http://www.sec.gov. You may also read and copy any documents that we file with the SEC at the SECs public reference room at 100 F
Street, N.E., Washington, D.C. 20549. You can request copies of these documents by writing to the SEC and paying a fee for the copying cost. Please call the SEC at 1-800-SEC-0330 for more information about the operation of the public reference room.

CAUTIONARY STATEMENT CONCERNING FORWARD-LOOKING STATEMENTS

Our disclosure and analysis in this prospectus and the materials we have filed or will file with the SEC (as well as information included
in our other written or oral statements) contain forward-looking statements within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act. Forward-looking statements present our current forecasts and estimates
of future events. These statements do not strictly relate to historical or current results and can be identified by words such as anticipate, believe, estimate, expect, intend,
likely, may, plan, project, strategy, will and other terms of similar meaning or import in connection with any discussion of future operating, financial or other performance.
These forward-looking statements are subject to risks, uncertainties and other factors that could cause actual results to differ materially from those projected in the statements. These risks, uncertainties and other factors include, without
limitation:



economic and political conditions, including new legislation or other governmental actions;

All
forward-looking statements in this prospectus and the documents incorporated or deemed incorporated by reference in this prospectus should be considered in the context of the risk and other factors described above and as detailed from time to time
in the Companys SEC filings. Any forward-looking statements speak only as of the date the statement is made and we undertake no obligation to update or revise any forward-looking statements, whether as a result of new information, future
events or otherwise. It is not possible to identify all of the risks, uncertainties and other factors that may affect future results. In light of these risks and uncertainties, the forward-looking events and circumstances discussed in this
prospectus and the documents incorporated or deemed incorporated by reference in this prospectus may not occur and actual results could differ materially from those anticipated or implied in the forward-looking statements. Accordingly, users of this
prospectus or any prospectus supplement are cautioned not to place undue reliance on the forward-looking statements.

OWENS CORNING

Owens Corning is incorporated in Delaware and headquartered in Toledo, Ohio. Owens Corning was founded
in 1938. Since then the Company has continued to grow as a market-leading innovator of glass fiber technology. Owens Corning is a world leader in composite and building materials systems, delivering a broad range of high-quality products and
services. Our products range from glass fiber used to reinforce composite materials for transportation, electronics, marine, infrastructure, wind-energy and other high-performance markets to insulation and roofing for residential, commercial and
industrial applications.

We operate within two segments: Composites, which includes our Reinforcements and Downstream
businesses, and Building Materials, which includes our Insulation and Roofing businesses.

An investment in our debt securities involves significant risks. Before purchasing any debt securities, you should carefully consider and
evaluate all of the information included and incorporated by reference or deemed to be incorporated by reference in this prospectus or the applicable prospectus supplement, including the risk factors incorporated by reference herein from our Annual
Report on Form 10-K for the year ended December 31, 2011, as updated by annual, quarterly and other reports and documents we file with the SEC after the date of this prospectus and that are incorporated by reference herein or in the applicable
prospectus supplement. Our business, financial position, results of operations or liquidity could be adversely affected by any of these risks.

USE OF PROCEEDS

Unless otherwise specified in a
prospectus supplement accompanying this prospectus, the net proceeds from the sale of debt securities to which this prospectus relates will be used for general corporate purposes. General corporate purposes may include repayment of debt,
acquisitions, additions to working capital, capital expenditures and investments in our subsidiaries. Net proceeds may be temporarily invested or applied to repay short-term debt prior to their stated use.

RATIO OF EARNINGS TO FIXED CHARGES

The following table sets forth our ratio of earnings to fixed charges for the periods indicated:

We will issue the debt securities in one or more series. Debt securities will be issued under the indenture dated as of June 2,
2009, among us, the Subsidiary Guarantors and Wells Fargo Bank, National Association, as trustee, or any other indenture which we identify in a prospectus supplement (we refer to the indenture dated as of June 2, 2009, as amended or
supplemented from time to time, and any such other indenture, as the indenture). We have summarized below the material provisions of the indenture. However, because this summary is not complete, it is subject to and is qualified in its
entirety by reference to the indenture. Definitions of certain terms used in this Description of Debt Securities, including the term Company, may be found below under Certain Definitions. In this
Description of Debt Securities, Owens Corning, we, us, our and similar words refer solely to Owens Corning and not any of its subsidiaries.

General

The debt
securities will be our general obligations and will rank on a parity with our other unsecured and unsubordinated indebtedness. The debt securities will be effectively subordinated to our senior secured indebtedness to the extent of the value of the
collateral securing such indebtedness.

The debt securities will be fully and unconditionally guaranteed as described below by
each of our current and future U.S. subsidiaries that is a borrower or a guarantor under the Credit Agreement (each a Subsidiary Guarantor and, collectively, the Subsidiary Guarantors). Each guarantee of the debt securities
by a Subsidiary Guarantor will be a general obligation of such Subsidiary Guarantor and will rank on a parity with the other unsecured and unsubordinated indebtedness of such Subsidiary Guarantor. Each guarantee will be effectively subordinated to
any secured indebtedness of the Subsidiary Guarantor, to the extent of the value of the collateral securing such indebtedness.

We may issue the debt securities in one or more series, as authorized from time to time by our Board of Directors, any committee of our
Board of Directors or any duly authorized officer. The indenture does not limit our ability to incur additional indebtedness, nor does it afford holders of the debt securities protection in the event of a highly leveraged or similar transaction
involving Owens Corning. However, the indenture provides, subject to significant exceptions, that neither we nor any of the Subsidiary Guarantors may subject certain of our property or assets to any lien (other than specified permitted liens) unless
the debt securities are secured equally and ratably with or prior to that other secured indebtedness. See Certain Covenants below. Reference is made to the applicable prospectus supplement for information with respect to any additions
to, or modifications or deletions of, the covenants or events of default described below.

We will describe in a supplement to
this prospectus the particular terms of any debt securities being offered, any modifications of or additions to the general terms of the debt securities and any material U.S. Federal income tax considerations that may be applicable in the case of
offered debt securities. Accordingly, you should read both the prospectus supplement relating to the particular debt securities being offered and the general description of debt securities set forth in this prospectus before investing.

The applicable prospectus supplement will describe specific terms relating to the series of debt securities being offered. These terms
will include some or all of the following:



the title of the series of debt securities;



the aggregate principal amount and authorized denominations (if other than $1,000 and integral multiples of $1,000);



the initial public offering price;



the original issue and stated maturity date or dates;



the interest rate or rates (which may be fixed or floating), if any, the method by which the rate or rates will be determined and the interest payment
and regular record dates;

the manner and place of payment of principal, premium, if any, and interest, if any;



if other than U.S. dollars, the currency or currencies in which payment of the initial public offering price and/or principal, premium, if any, and
interest, if any, may be made;



whether (and if so, when and at what price) we may be obligated to repurchase the debt securities;



whether (and if so, when and at what price) the debt securities can be redeemed by us or the holder;



under what circumstances, if any, we will pay additional amounts on the debt securities to non-U.S. holders in respect of taxes;



whether the debt securities will be issued in registered or bearer form (with or without coupons) and, if issued in the form of one or more global
securities, the depositary for such securities;



where the debt securities can be exchanged or transferred;



whether the debt securities may be issued as original issue discount securities, and if so, the amount of discount and the portion of the principal
amount payable upon declaration of acceleration of the maturity thereof;



whether (and if so, when and at what rate) the debt securities will be convertible into shares of our common stock;



whether there will be a sinking fund;



provisions, if any, for the defeasance or discharge of the debt securities;



any addition to, or modification or deletion of, any events of default or covenants contained in the indenture relating to the debt securities; and



any other terms of the series.

If we issue original issue discount securities, we will also describe in the applicable prospectus supplement the material U.S. Federal income tax consequences and other special considerations applicable
to those securities.

We are not required to issue all of the debt securities of a series at the same time, and debt
securities of the same series may vary as to interest rate, maturity and other provisions. Unless otherwise provided in the applicable prospectus supplement, the aggregate principal amount of a series may be increased and additional debt securities
of such series may be issued.

Denominations, Registration, Transfer and Exchange

Unless otherwise specified in the applicable prospectus supplement, the debt securities of any series will be issued only as registered
securities, in global or certificated form and in denominations of $1,000 and any integral multiple thereof, and will be payable only in U.S. dollars. For more information regarding debt securities issued in global form, see Book-Entry,
Delivery and Form below. Unless otherwise indicated in the applicable prospectus supplement, any debt securities we issue in bearer form will have coupons attached.

Registered debt securities of any series (other than registered debt securities in global form) will be exchangeable for other registered debt securities of the same series in the same aggregate principal
amount and having the same stated maturity date and other terms and conditions. If so provided in the applicable prospectus supplement, to the extent permitted by law, debt securities of any series issued in bearer form which by their terms are
registrable as to principal and interest may be exchanged, at the option of the holders, for registered debt securities of the same series in the same aggregate principal amount and having the same stated maturity date and other terms and
conditions, upon surrender of those securities at the corporate trust office of the trustee or at any other office or agency designated by us for the purpose of making any such exchanges. Except in certain limited circumstances, debt securities
issued in bearer form with coupons surrendered for exchange must be surrendered with all unmatured coupons and any matured coupons in default attached thereto.

Upon surrender for registration of transfer of any registered debt security of any series at
the office or agency maintained for that purpose, we will execute, and the trustee will authenticate and deliver, in the name of the designated transferee, one or more new registered debt securities of the same series in the same aggregate principal
amount of authorized denominations and having the same stated maturity date and other terms and conditions. We may not impose any service charge, other than any required tax or other governmental charge, on the transfer or exchange of debt
securities.

We are not required (i) to issue, register the transfer of or exchange debt securities of any series during
the period from the opening of business 15 days before the day a notice of redemption relating to debt securities of that series selected for redemption is sent to the close of business on the day that notice is sent, or (ii) to register
the transfer of or exchange any debt security so selected for redemption, except for the unredeemed portion of any debt security being redeemed in part.

Payment and Paying Agents

If we issue a series of debt securities only in
registered form, we will maintain in each place of payment for those debt securities an office or agency where those debt securities may be presented or surrendered for payment or for registration of transfer or exchange and where holders may serve
us with notices and demands in respect of the debt securities of that series and the indenture. We may also maintain an office or agency in a place of payment for that series of debt securities located outside the United States, where any registered
debt securities of that series may be surrendered for registration of transfer or exchange and where holders may serve us with notices and demands in respect of those debt securities and the indenture.

We will give prompt written notice to the trustee of the location, and any change in the location, of such office or agency. If we fail
to maintain any required office or agency or fail to furnish the trustee with the address of such office or agency, presentations, surrenders, notices and demands may be made or served at the corporate trust office of the trustee. We have appointed
the trustee as our agent to receive all presentations, surrenders, notices and demands with respect to the applicable series of debt securities.

Certain Covenants

Unless otherwise specified in the applicable prospectus
supplement, set forth below are certain covenants that apply to the debt securities:

Limitation on Mortgages and
Liens. Neither we nor any of our Subsidiaries may, directly or indirectly, create, incur, issue, assume, guarantee or otherwise become directly or indirectly liable, contingently or otherwise, with respect to any Indebtedness secured by a Lien
(other than a Permitted Lien) upon any Principal Property or upon the Capital Stock of any Subsidiary (in each case, whether owned on the date of the indenture or thereafter acquired) without equally and ratably securing any debt securities then
outstanding, unless the aggregate principal amount of all outstanding Indebtedness of the Company and its Subsidiaries that is secured by Liens (other than Permitted Liens) on any Principal Property or upon the Capital Stock of any Subsidiary (in
each case, whether owned on the date of the indenture or thereafter acquired) plus the amount of all outstanding Attributable Debt incurred pursuant to the first bullet under the covenant entitled Limitation on Sale and Leaseback
Transactions would not exceed 10% of Consolidated Net Tangible Assets calculated as of the date of the creation or incurrence of the Lien. This limitation does not apply to Permitted Liens as described in the indenture (and defined in
Certain Definitions), including:



Liens existing on the date of the indenture;



Liens in favor of the Company or any of its Subsidiaries;



Liens on property owned by a Person existing at the time such Person is merged with or into or consolidated with the Company or any of its
Subsidiaries, which Liens existed prior to the contemplation of such merger or consolidation and which do not extend to any assets other than those of such Person;

Liens on acquired property existing at the time of the acquisition, which existed prior to the contemplation of such acquisition;



Liens to secure the performance of statutory or regulatory obligations, surety or appeal bonds, performance bonds or other similar obligations;



Liens for taxes, assessments or governmental charges or claims that are not yet delinquent or that are being contested in good faith by appropriate
proceedings; and



any extension, renewal or replacement of any Lien referred to above, so long as (1) such extension, renewal or replacement Lien is limited to the
same property that secured the original Lien and (2) the indebtedness secured by the new Lien is not greater than the indebtedness secured by the original Lien.

Limitation on Sale and Leaseback Transactions. Neither we nor any of our Subsidiaries may sell any Principal Property (whether
owned on the date of the indenture or thereafter acquired) with the intention of taking back a lease of that property for a period of more than three years (including renewals at the option of the lessee) other than leases between the Company and
any of its Subsidiaries or leases between Subsidiaries of the Company, unless:



after giving effect thereto, the aggregate amount of all outstanding Attributable Debt with respect to all such transactions, plus the amount of
outstanding indebtedness secured by a Lien (other than a Permitted Lien) upon any Principal Property or upon the Capital Stock of any Subsidiary (in each case, now owned or hereafter acquired) incurred without equally and ratably securing the debt
securities pursuant to the covenant entitled Limitation on Mortgages and Liens, would not exceed 10% of Consolidated Net Tangible Assets calculated at the time of the transaction; or



within 120 days after such sale and leaseback transaction, the Company or such Subsidiary applies an amount equal to the greater of the net proceeds of
such sale and leaseback transaction and the fair market value at the time of the transaction of the Principal Property so leased to the retirement of Funded Debt of the Company or any of its Subsidiaries.

Covenant to File Reports. We will file with the trustee, within 15 days after we are required to file with the SEC, copies of the
annual reports and of the information, documents, and other reports which we are required to file with the SEC pursuant to Section 13 or Section 15(d) of the Exchange Act.

Merger or Consolidation

We may not, directly or indirectly:
(1) consolidate or merge with or into another Person (whether or not the Company is the surviving corporation) or (2) sell, assign, transfer, convey or otherwise dispose of all or substantially all of the properties or assets of the
Company and its Subsidiaries, taken as a whole, in one or more related transactions, to another Person, unless:



either (a) we are the survivor formed by or resulting from such consolidation or merger or (b) the surviving or successor entity (if other
than the Company) or the Person to which such sale, assignment, transfer, conveyance or other disposition has been made is a corporation or limited liability company organized or existing under the laws of the United States, any State of the United
States or the District of Columbia;



the surviving or successor entity (if other than the Company) or the Person to which such sale, assignment, transfer, conveyance or other disposition
has been made assumes all the obligations of the Company under the debt securities and the indenture pursuant to a supplemental indenture reasonably satisfactory to the trustee;



immediately after completion of the transaction, no Event of Default, and no event which, after notice or lapse of time, or both, would become an Event
of Default, exists; and

the surviving or successor entity (if other than the Company) or the Person to which such sale, assignment, transfer, conveyance or other disposition
has been made shall have delivered to the trustee an officers certificate and opinion of counsel, each stating that such transaction and any supplemental indenture entered into in connection with such transaction comply with the indenture
provisions and that all conditions precedent in the indenture relating to such transaction have been complied with.

In addition, the Company may not, directly or indirectly, lease all or substantially all of the properties or assets of the Company and its Subsidiaries, taken as a whole, in one or more related
transactions, to another Person. However, the restriction on mergers, consolidations and dispositions of substantially all assets shall not apply to:



a merger of the Company with an affiliate solely for the purpose of reincorporating the Company in another jurisdiction; or



any consolidation or merger, or any sale, assignment, transfer, conveyance, lease or other disposition of assets between or among the Company and its
Subsidiaries.

Additional Subsidiary Guarantees

We will not permit any of our domestic Subsidiaries to, directly or indirectly, guarantee any Persons obligations under our Credit
Agreement unless such Subsidiary is a Subsidiary Guarantor or concurrently executes a supplemental indenture and a guarantee of the Companys obligations under the indenture and the debt securities of any series (each, a Note
Guarantee).

Events of Default

Event of Default means, with respect to a series of debt securities, any of the following events:

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failure to pay interest on the debt securities of such series, which failure continues for a period of 30 days after payment is due;

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failure to make any principal or premium payment on the debt securities of such series when due;

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failure to comply with any agreement in the indenture (other than those described in the two preceding bullet points) for 60 days after we receive
notice of such failure from the trustee or the holders of at least 25% in aggregate principal amount of the debt securities of such series then outstanding voting as a single class;

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default under any mortgage, indenture or instrument under which there may be issued or by which there may be secured or evidenced any indebtedness for
money borrowed by the Company or any of its Subsidiaries (or the payment of which is guaranteed by the Company or any of its Subsidiaries), whether such indebtedness or guarantee existed as of the date of the indenture or is created thereafter, and
which default (i) is caused by a failure to pay principal of, or interest or premium, if any, on, such indebtedness prior to the expiration of the grace period provided in such indebtedness on the date of such default (a Payment
Default) or (ii) results in the acceleration of such indebtedness prior to its express maturity; and, in each case, the principal amount of any such indebtedness, together with the principal amount of any other such indebtedness under
which there has been a Payment Default or the maturity of which has been so accelerated, aggregates $75 million or more;

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certain events of bankruptcy, insolvency or reorganization of the Company or any of its Subsidiaries that is a Significant Subsidiary or any group of
Subsidiaries of the Company that, taken together, would constitute a Significant Subsidiary;

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except as permitted by the indenture, any Note Guarantee of the debt securities of such series is held in any judicial proceeding to be unenforceable
or invalid or ceases for any reason to be in full force and effect, or any Subsidiary Guarantor, or any Person acting on behalf of any Subsidiary Guarantor, denies or disaffirms its obligations under its Note Guarantee of the debt securities of such
series; or

any other Event of Default provided with respect to debt securities of such series pursuant to the indenture.

In the case of an Event of Default arising from certain events of bankruptcy or insolvency with respect to the Company, any Subsidiary of
the Company that is a Significant Subsidiary or any group of Subsidiaries of the Company that, taken together, would constitute a Significant Subsidiary, all outstanding debt securities of each series will become due and payable immediately without
further action or notice. If any other Event of Default occurs and is continuing, the trustee or the holders of at least 25% in aggregate principal amount of the then outstanding debt securities of a particular series may declare all the debt
securities of such series to be due and payable immediately.

Subject to certain limitations, holders of a majority in
aggregate principal amount of the then outstanding debt securities of a particular series may direct the trustee in its exercise of any trust or power with respect to that series. The trustee may withhold from holders of the debt securities of any
series notice of any continuing default or Event of Default if it determines that withholding notice is in their interest, except a default or Event of Default relating to the payment of principal, interest or premium, if any, on such debt
securities.

Subject to the provisions of the indenture relating to the duties of the trustee, in case an Event of Default
occurs and is continuing, the trustee will be under no obligation to exercise any of the rights or powers under the indenture with respect to any series of debt securities at the request or direction of any holders of such series of debt securities
unless such holders have offered to the trustee reasonable indemnity or security against any loss, liability or expense. Except to enforce the right to receive payment of principal, premium, if any, or interest, if any, when due, no holder of a debt
security of a particular series may institute any proceeding for any remedy with respect to the indenture or such series of debt securities unless:

(1) such holder has previously given the trustee written notice that an Event of Default is continuing;

(2) holders of at least 25% in aggregate principal amount of the then outstanding debt securities of such series have requested in writing that the trustee pursue such proceedings in respect of such Event
of Default as trustee;

(3) such holders have offered to the trustee indemnity reasonably satisfactory to the
trustee against any cost, liability or expense which may be incurred in compliance with such request;

(4) the
trustee has not instituted such proceeding within 60 days after the receipt of the request and the offer of indemnity; and

(5) holders of a majority in aggregate principal amount of the then outstanding debt securities of such series have not given the trustee a direction inconsistent with such request within such 60-day
period.

The holders of a majority in aggregate principal amount of the then outstanding debt securities of a particular
series by notice to the trustee may (subject to certain conditions), on behalf of the holders of all of the debt securities of such series, rescind an acceleration or waive any existing default or Event of Default and its consequences under the
indenture except a continuing default or Event of Default in the payment of interest or premium, if any, on, or the principal of, the debt securities of such series.

We are required to deliver to the trustee annually a certificate regarding compliance with the indenture. Upon becoming aware of any default or Event of Default, we are required to deliver to the trustee
a statement specifying such default or Event of Default.

We and the trustee may, at any time and from time to time, amend the indenture or the debt securities of any series without notice to or the consent of the holders of outstanding debt securities for any
of the following purposes:

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to effect the assumption of the Companys or any Subsidiary Guarantors obligations under the indenture by a successor Person;

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to impose additional covenants and Events of Default for the benefit of the holders of any series of debt securities;

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to add or change any of the provisions of the indenture relating to the issuance or exchange of debt securities of any series in registered form, but
only if such action does not adversely affect the interests of the holders of outstanding debt securities of such series or related coupons in any material respect;

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to change or eliminate any of the provisions of the indenture, but only if the change or elimination becomes effective when there is no outstanding
debt security of any series or related coupon which is entitled to the benefit of such provision and as to which such modification would apply;

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to secure the debt securities of any series;

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to supplement any of the provisions of the indenture to permit or facilitate the defeasance and discharge of any series of debt securities, but only if
such action does not adversely affect the interests of the holders of outstanding debt securities of any series or related coupons in any material respect;

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to establish the form or terms of the debt securities and coupons, if any, of any series as permitted by the indenture;

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to evidence and provide for the acceptance of appointment by a successor trustee and to add to or change any of the provisions of the indenture to
facilitate the administration of the trusts by more than one trustee;

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to correct any mistakes or defects in the indenture, but only if such action does not adversely affect the interests of the holders of outstanding debt
securities or related coupons in any material respect or otherwise amend the indenture in any respect that does not adversely affect the interests of the holders of outstanding debt securities or related coupons;

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to conform the text of the indenture, the debt securities or the Note Guarantees to any provision of a description of such debt securities appearing in
a prospectus or prospectus supplement or an offering memorandum or circular pursuant to which such debt securities were offered to the extent that such provision was intended to be a verbatim recitation of a provision of the indenture, the debt
securities or the Note Guarantees;

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to allow any Subsidiary Guarantor to execute a supplemental indenture and/or a Note Guarantee with respect to the debt securities of a particular
series; and

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to comply with requirements of the SEC in order to effect or maintain the qualification of this indenture under the Trust Indenture Act of 1939.

In addition, we and the trustee may amend the indenture and the debt securities of any series with the
consent of the holders of not less than a majority in principal amount of each series of outstanding debt securities affected by such modification to add, change or eliminate any provision of, or to modify the rights of holders of debt securities of
such series under, the indenture. But we may not take any of the following actions without the consent of each holder of outstanding debt securities of any series affected thereby:

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change the stated maturity of the principal of, or any installment of interest on, the debt securities of any series or related coupon, reduce the
principal amount thereof, the interest thereon or any premium payable upon redemption thereof or change the currency or currencies in which the principal, premium or interest is denominated or payable;

reduce the amount of, or impair the right to institute suit for the enforcement of, any payment on the debt securities of any series following maturity
thereof;

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reduce the percentage in principal amount of outstanding debt securities of any series required for consent to any waiver of defaults or compliance
with certain provisions of the indenture with respect to such series; or

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modify any provision of the indenture relating to modifications and waivers of defaults and covenants, except to increase any such percentage or to
provide that certain other provisions cannot be modified or waived without the consent of each holder of outstanding debt securities affected thereby.

A modification with respect to one or more particular series of debt securities and related coupons, if any, will not affect the rights under the indenture of the holders of debt securities of any other
series and related coupons, if any.

The holders of a majority in principal amount of the outstanding debt securities of any
series may, on behalf of the holders of all debt securities of such series, waive an existing default or Event of Default under the indenture with respect to the debt securities of such series and its consequences, except a default or Event of
Default (i) in the payment of principal of, premium or interest, if any, on such series or (ii) in respect of a covenant or provision which, as described above, cannot be modified or amended without the consent of each holder of debt
securities of such series affected. Upon any such waiver, the default will cease to exist with respect to the debt securities of such series and any Event of Default arising therefrom will be deemed to have been cured for every purpose of the
indenture, but the waiver will not extend to any subsequent or other default or Event of Default or impair any right consequent thereto.

We may elect in any particular instance not to comply with any term, provision or condition set forth in the covenants Limitation on Mortgages and Liens and Limitation on Sale and
Leaseback Transactions (see Certain Covenants) and the covenant regarding future Subsidiary Guarantors (see Additional Subsidiary Guarantees)(and any other covenant not specified herein but which is specified to
be subject to this waiver provision pursuant to the terms of any particular series of debt securities), if, before the time for such compliance, the holders of at least a majority in principal amount of the outstanding debt securities of such series
either waive compliance in that instance or generally waive compliance with those provisions, but the waiver may not extend to or affect any term, provision or condition except to the extent expressly so waived, and, until the waiver becomes
effective, our obligations and the duties of the trustee in respect of any such provision will remain in full force and effect.

Discharge,
Legal Defeasance and Covenant Defeasance

We may be discharged from all of our obligations under the indenture with respect
to the outstanding debt securities of any series (except as otherwise provided in the indenture) when:

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either (i) all the debt securities of such series and related coupons, if any, have been delivered to the trustee for cancellation, or
(ii) all the debt securities of such series and related coupons, if any, not delivered to the trustee for cancellation:

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have become due and payable;

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will become due and payable at their stated maturity within one year; or

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are to be called for redemption within one year under arrangements satisfactory to the trustee for the giving of notice by the trustee;

and we, in the case of clause (ii), have irrevocably deposited or caused to be deposited with the trustee,
in trust, an amount in U.S. dollars, U.S. government securities or a combination thereof sufficient for payment of all principal of, premium, if any, and interest on those debt securities when due or to the

date of redemption, as the case may be; provided, however, in the event a petition for relief under any applicable federal or state bankruptcy, insolvency or other similar law is
filed with respect to the Company within 91 days after the deposit and the trustee is required to return the deposited money to us, our obligations under the indenture with respect to those debt securities will not be deemed terminated or
discharged;

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we have paid or caused to be paid all other sums payable by us under the indenture with respect to such series of debt securities;

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we have delivered to the trustee an officers certificate and an opinion of counsel each stating that all conditions precedent relating to the
satisfaction and discharge of the indenture with respect to such series of debt securities have been complied with; and

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we have delivered to the trustee an opinion of counsel of recognized standing in respect of U.S. federal income tax matters or a ruling of the Internal
Revenue Service to the effect that holders of debt securities of such series will not recognize income, gain or loss for U.S. federal income tax purposes as a result of such deposit and discharge.

We may elect (i) to be discharged from our obligations with respect to the outstanding debt securities of any
series and the provisions of the indenture shall no longer be in effect with respect to debt securities of such series (except as otherwise specified in the indenture) on the 123rd day after the deposit referred to in the first bullet below has been made or (ii) to be released from our
obligation to comply with the provisions of the indenture described above under Certain CovenantsLimitation on Mortgages and Liens and Limitation on Sale and Leaseback Transactions and the Events of Default
described under the third and fourth bullet points under Events of Default shall no longer constitute Events of Default with respect to the outstanding debt securities of any series (and, if so specified, any other obligation or
restrictive covenant added for the benefit of the holders of such series of debt securities), in either case, if we satisfy each of the following conditions:

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we deposit or cause to be deposited irrevocably with the trustee, in trust, specifically pledged as security for, and dedicated solely to, the benefit
of the holders of debt securities of such series money or the equivalent in U.S. government securities, or any combination thereof, sufficient, in the opinion of a nationally recognized firm of independent public accountants expressed in a written
certification delivered to the trustee, for payment of all principal of, premium, if any, and interest on the outstanding debt securities of such series when due;

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such deposit does not cause the trustee with respect to the debt securities of such series to have a conflicting interest with respect to the debt
securities of such series;

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such deposit will not result in a breach or violation of, or constitute a default under, the indenture or any other agreement or instrument to which we
are a party or by which we are bound;

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on the date of such deposit, there is no continuing Event of Default with respect to the debt securities of such series or event (including such
deposit) which, with notice or lapse of time or both, would become an Event of Default with respect to the debt securities of such series and, with respect to the option under clause (i) above only, no Event of Default with respect to such
series under the provisions of the indenture relating to certain events of bankruptcy or insolvency or event which, with notice or lapse of time or both, would become an Event of Default with respect to such series under such bankruptcy or
insolvency provisions shall have occurred and be continuing on the 91st day after such date; and

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we deliver to the trustee an opinion of counsel of recognized standing in respect of U.S. federal income tax matters or a ruling of the Internal
Revenue Service to the effect that the holders of debt securities of such series will not recognize income, gain or loss for U.S. federal income tax purposes as a result of such deposit, defeasance or discharge.

Notwithstanding the foregoing, if we exercise our option under clause (ii) above and an Event of Default with respect to such series
of debt securities under the provisions of the indenture relating to certain events of bankruptcy or insolvency or event which, with notice or lapse of time or both, would become an Event of Default

with respect to such series of debt securities under such bankruptcy or insolvency provisions shall have occurred and be continuing on the 91st day after the date of such deposit, our obligation
to comply with the provisions of the indenture described above under Certain CovenantsLimitation on Mortgages and Liens and Limitation on Sale and Leaseback Transactions and the Events of Default described
under the third bullet point under Events of Default with respect to those debt securities will be reinstated.

The
Trustee Under the Indenture

We maintain ordinary banking relationships and, from time to time, obtain credit facilities
and lines of credit with a number of banks, including the trustee, Wells Fargo Bank, National Association.

Book-Entry, Delivery and Form

We may issue the debt securities of a series in whole or in part in global form that we will deposit with, or on behalf
of, a depositary identified in the applicable prospectus supplement. Global securities may be issued in either registered or bearer form and in either temporary or permanent form. We will make payments of principal of, and premium, if any, and
interest on debt securities represented by a global security to the trustee and then by the trustee to the depositary.

We
anticipate that any global securities will be deposited with, or on behalf of, The Depository Trust Company (DTC), New York, New York, and will be registered in the name of DTCs nominee, and that the following provisions will apply
to the depositary arrangements with respect to any global securities. We will describe additional or differing terms of the depositary arrangements in the prospectus supplement relating to a particular series of debt securities issued in the form of
global securities.

Upon the issuance of a registered global security, the depositary will credit, on its book-entry
registration and transfer system, the participants accounts with the respective principal or face amounts of the debt securities beneficially owned by the participants. Any dealers, underwriters or agents participating in the distribution of
the debt securities will designate the accounts to be credited. Ownership of beneficial interests in a registered global security will be shown on, and the transfer of ownership interests will be effected only through, records maintained by the
depositary, with respect to interests of participants, and on the records of participants, with respect to interests of persons holding through participants.

So long as the depositary, or its nominee, is the registered owner of a registered global security, that depositary or its nominee, as the case may be, will be considered the sole owner or holder of the
debt securities represented by the registered global security for all purposes under the indenture. Except as described below, owners of beneficial interests in a registered global security will not be entitled to have the debt securities
represented by the registered global security registered in their names, will not receive or be entitled to receive physical delivery of the debt securities in definitive form and will not be considered the owners or holders of the debt securities
under the indenture. Accordingly, each person owning a beneficial interest in a registered global security must rely on the procedures of the depositary for that registered global security and, if that person is not a participant, on the procedures
of the participant through which the person owns its interest, to exercise any rights of a holder under the indenture. The laws of some states may require that some purchasers of securities take physical delivery of those securities in definitive
form. Such laws may impair the ability to transfer beneficial interests in a global security.

To facilitate subsequent
transfers, all debt securities deposited by participants with DTC are registered in the name of DTCs nominee, Cede & Co. The deposit of the debt securities with DTC and their registration in the name of Cede & Co. effect no
change in beneficial ownership. DTC has no knowledge of the actual beneficial owners of the debt securities. DTCs records reflect only the identity of the direct participants to whose accounts such debt securities are credited, which may or
may not be the beneficial owners. The participants will remain responsible for keeping account of their holdings on behalf of their customers.

We will make payments due on any debt securities represented by a global security to
Cede & Co., as nominee of DTC, in immediately available funds. DTCs practice upon receipt of any payment of principal, premium, interest or other distribution of underlying securities or other property to holders on that registered
global security is to immediately credit participants accounts in amounts proportionate to their respective beneficial interests in that registered global security as shown on the records of the depositary. Payments by participants to owners
of beneficial interests in a registered global security held through participants will be governed by standing customer instructions and customary practices, as is now the case with the securities held for the accounts of customers in bearer form or
registered in street name, and will be the responsibility of those participants. Payment to Cede & Co. is our responsibility. Disbursement of such payments to direct participants is the responsibility of Cede & Co.
Disbursement of such payments to the beneficial owners is the responsibility of direct and indirect participants.

Neither we
nor the trustee nor any other agent of ours or any agent of the trustee will have any responsibility or liability for any aspect of the records relating to payments made on account of beneficial ownership interests in the registered global security
or for maintaining, supervising or reviewing any records relating to those beneficial ownership interests.

We expect that DTC
will take any action permitted to be taken by a holder of securities (including the presentation of securities for exchange as described below) only at the direction of one or more participants to whose account the DTC interests in a global security
are credited and only in respect of such portion of the aggregate principal amount of the securities as to which such participant or participants has or have given such direction. However, if there is an Event of Default under the debt securities
represented by a global security, DTC will exchange each global security for definitive securities, which it will distribute to its participants.

If the depositary for any of the debt securities represented by a registered global security is at any time unwilling or unable to continue as depositary or ceases to be a clearing agency registered under
the Exchange Act, and a successor depositary registered as a clearing agency under the Exchange Act is not appointed by the obligor within 90 days, we will issue debt securities in definitive form in exchange for the registered global security that
had been held by the depositary. Any debt securities issued in definitive form in exchange for a registered global security will be registered in the name or names that the depositary gives to the trustee or other relevant agent of the obligor or
trustee. It is expected that the depositarys instructions will be based upon directions received by the depositary from participants with respect to ownership of beneficial interests in the registered global security that had been held by the
depositary. In addition, we may at any time determine that the debt securities of any series shall no longer be represented by a global security and will issue securities in definitive form in exchange for such global security pursuant to the
procedure described above.

DTC is a limited-purpose trust company organized under the New York Banking Law, a banking
organization within the meaning of the New York Banking Law, a member of the Federal Reserve System, a clearing corporation within the meaning of the New York Uniform Commercial Code and a clearing agency registered
pursuant to the provisions of Section 17A of the Exchange Act. DTC was created to hold securities of its participants and to facilitate the clearance and settlement of securities transactions, such as transfers and pledges, among its
participants in such securities through electronic computerized book-entry changes in accounts of the participants, thereby eliminating the need for physical movement of securities certificates. DTCs participants include securities brokers and
dealers, banks, trust companies, clearing corporations and certain other organizations, some of whom own DTC. Access to DTCs book-entry system is also available to others, such as banks, brokers, dealers and trust companies that clear through
or maintain a custodial relationship with a participant, either directly or indirectly. The rules applicable to DTC and its participants are on file with the SEC.

The information in this prospectus concerning DTC and DTCs book-entry system has been obtained from sources that we believe to be reliable, but we take no responsibility for its accuracy or
completeness. We assume no responsibility for the performance by DTC or its participants of their respective obligations, including obligations that they have under the rules and procedures that govern their operations.

We have summarized below certain defined terms as used in the indenture. We refer you to the indenture for the full definition of these terms.

Attributable Debt in respect of a Sale and Leaseback Transaction means, at the time of the determination, the present value
of the obligation of the lessee for net rental payments during the remaining term of the lease included in such Sale and Leaseback Transaction including any period for which such lease has been extended or may, at the option of the lessor, be
extended. Such present value shall be calculated using a discount rate equal to the rate of interest implicit in such transaction, determined in accordance with GAAP.

Business Day means, unless otherwise provided with respect to a series of Securities, any day other than a Legal Holiday.

Capital Lease Obligation means, at the time any determination is to be made, the amount of the liability in respect of a
capital lease that would at that time be required to be capitalized on a balance sheet prepared in accordance with GAAP.

Capital Stock means:

(1) in the case of a corporation, corporate stock;

(2) in the
case of an association or business entity, any and all shares, interests, participations, rights or other equivalents (however designated) of corporate stock;

(3) in the case of a partnership or limited liability company, partnership interests (whether general or limited) or membership interests; and

(4) any other interest or participation that confers on a Person the right to receive a share of the profits and losses
of, or distributions of assets of, the issuing Person.

but excluding from all of the foregoing any debt securities convertible into Capital
Stock, whether or not such debt securities include any right of participation with Capital Stock.

Company means
Owens Corning, a Delaware corporation, until a successor replaces it pursuant to the Article 5 of the indenture and thereafter means the successor.

Consolidated Net Tangible Assets means the aggregate amount of assets of the Company and its Subsidiaries (less applicable reserves and other properly deductible items) after deducting
therefrom (a) all current liabilities (excluding any current liabilities constituting Funded Debt by reason of being extendible or renewable), (b) all goodwill, trade names, trademarks, patents, unamortized debt discount and expense and
other like intangibles and (c) minority equity interests in any Subsidiary of the Company that is not a Wholly-Owned Subsidiary, all as set forth on or included in the balance sheet of the Company and its Subsidiaries for its most recent
completed fiscal quarter for which internal financial statements are available computed in accordance with GAAP.

Credit
Agreement means the Credit Agreement executed on October 31, 2006, among the Company, the lending institutions party thereto and Citibank N.A., as administrative agent, and any related notes, Guarantees, collateral documents, instruments
and agreements to be executed in connection therewith, and in each case, as amended, restated, modified, renewed, refunded, replaced (whether upon termination or otherwise) or refinanced in whole or in part from time to time.

Funded Debt means all Indebtedness, whether or not evidenced by a bond, debenture, note or similar instrument or agreement,
of any Person, for the repayment of borrowed money having a maturity of more than 12 months from the date of its creation or having a maturity of less than 12 months from the date of its creation but

by its terms being renewable or extendible beyond 12 months from such date at the option of such Person. For the purpose of determining Funded Debt of any Person, there will be
excluded any particular Indebtedness if, on or prior to the maturity thereof, there will have been deposited with the proper depository in trust the necessary funds for the payment, redemption or satisfaction of such Indebtedness.

GAAP means, as to a particular Person, such accounting principles as, in the opinion of the independent public accountants
regularly retained by such Person, conform at the time to accounting principles generally accepted in the United States.

Governmental Authority means any nation or government, any state or other political subdivision thereof and any entity
exercising executive, legislative, judicial, regulatory or administrative functions of or pertaining to government.

Guarantee means a guarantee other than by endorsement of negotiable instruments for collection in the ordinary course of
business, direct or indirect, in any manner, including, without limitation, by way of a pledge of assets or through letters of credit or reimbursement agreements in respect thereof, of all or any part of any Indebtedness (whether arising by virtue
of partnership arrangements, or by agreements to keep-well, to purchase assets, goods, securities or services, to take or pay or to maintain financial statement conditions or otherwise).

Hedging Obligations means, with respect to any specified Person, the obligations of such Person under:

(2) foreign exchange contracts and currency protection agreements or other similar agreements
or arrangements; and

(3) any commodity futures contract, commodity option or other similar agreements or
arrangements.

Indebtedness means, with respect to any specified Person, any indebtedness of such Person, whether
or not contingent:

(1) in respect of borrowed money;

(2) evidenced by bonds, notes, debentures or similar instruments or letters of credit (or reimbursement agreements in
respect thereof);

(3) in respect of bankers acceptances;

(4) representing Capital Lease Obligations;

(5) representing the balance deferred and unpaid of the purchase price of any property, except any such balance that
constitutes an accrued expense or trade payable; or

(6) representing any Hedging Obligations,

if and to the extent any of the preceding items (other than letters of credit and Hedging Obligations) would appear as a liability upon a balance sheet
of the specified Person prepared in accordance with GAAP. In addition, the term Indebtedness includes all indebtedness of others secured by a Lien on any asset of the specified Person (whether or not such Indebtedness is assumed by the
specified Person) and, to the extent not otherwise included, the Guarantee by the specified Person of any Indebtedness of any other Person.

The amount of any Indebtedness outstanding as of any date will be:

(1) the accreted value of the Indebtedness, in the case of any Indebtedness issued with original issue discount; and

(2) the principal amount of the Indebtedness, together with any interest on
the Indebtedness that is more than 30 days past due, in the case of any other Indebtedness.

Legal Holiday means a
Saturday, a Sunday or a day on which banking institutions in the City of New York or at a place of payment are authorized by law, regulation or executive order to remain closed.

Lien means, with respect to any asset, any mortgage, lien, pledge, charge, security interest or encumbrance of any kind in
respect of such asset, whether or not filed, recorded or otherwise perfected under applicable law, including any conditional sale or other title retention agreement, any lease in the nature thereof, any option or other agreement to sell or give a
security interest in and any filing of or agreement to give any financing statement under the Uniform Commercial Code (or equivalent statutes) of any jurisdiction.

Permitted Liens means:

(1) Liens existing on the date
of the indenture;

(2) Liens in favor of the Company or any of its Subsidiaries;

(3) Liens on property of a Person existing at the time such Person is merged with or into or consolidated with the Company
or any Subsidiary of the Company; provided that such Liens were in existence prior to the contemplation of such merger or consolidation and do not extend to any assets other than those of the Person merged into or consolidated with the Company or
the Subsidiary;

(4) Liens on property existing at the time of acquisition of the property by the Company or
any Subsidiary of the Company, provided that such Liens were in existence prior to the contemplation of such acquisition;

(5) Liens to secure the performance of statutory or regulatory obligations, surety or appeal bonds, performance bonds or other obligations of a like nature incurred in the ordinary course of business;

(6) Liens for taxes, assessments or governmental charges or claims that are not yet delinquent or that are
being contested in good faith by appropriate proceedings promptly instituted and diligently concluded; provided that any reserve or other appropriate provision as is required in conformity with GAAP has been made therefor;

(7) any extension, renewal or replacement of any Lien referred to above; provided that (a) such extension, renewal or
replacement Lien is limited to the same property that secured the original Lien (plus improvements and accessions to such property) and (b) the Indebtedness secured by the new Lien is not greater than the Indebtedness secured by the Lien that
is extended, renewed or replaced; and

(8) zoning restrictions, easements, rights-of-way, restrictions on the
use of property, other similar encumbrances incurred in the ordinary course of business and minor irregularities of title, which do not materially interfere with the ordinary conduct of the business of the Company and its Subsidiaries taken as a
whole.

Principal Property means any manufacturing plant, warehouse or other similar facility or any parcel of real estate or group of contiguous parcels of real estate owned by the Company or any of
its Subsidiaries (whether owned on the date of the indenture or thereafter acquired) that has a gross book value on the date as of which the determination is being made, without deduction of any depreciation reserves, exceeding 1% of Consolidated
Net Tangible Assets.

Sale and Leaseback Transaction means any arrangement with any Person providing
for the leasing by the Company or any Subsidiary of the Company of any Principal Property which has been or is to be sold or transferred by the Company or any such Subsidiary to such Person with the intention of taking back a lease of such property,
except for temporary leases for a term (including renewals at the option of the lessee) of not more than three years and except for leases between the Company and a Subsidiary or between Subsidiaries of the Company.

Significant Subsidiary means any Subsidiary that would be a significant subsidiary as defined in Article 1, Rule
1-02 of Regulation S-X, promulgated pursuant to the Securities Act, as such Regulation is in effect on the date of the indenture.

Subsidiary means, with respect to any specified Person:

(1) any corporation, association or other business entity of which more than 50% of the total voting power of shares of
Capital Stock entitled (without regard to the occurrence of any contingency and after giving effect to any voting agreement or stockholders agreement that effectively transfers voting power) to vote in the election of directors, managers or
trustees of the corporation, association or other business entity is at the time owned or controlled, directly or indirectly, by that Person or one or more of the other Subsidiaries of that Person (or a combination thereof); and

(2) any partnership (a) the sole general partner or the managing general partner of which is such Person or a
Subsidiary of such Person or (b) the only general partners of which are that Person or one or more Subsidiaries of that Person (or any combination thereof).

Wholly-Owned Subsidiary means, as to any Person, (i) any corporation 100% of whose capital stock (other than directors qualifying shares and/or other nominal amounts of shares
required by applicable law to be held by Persons other than such Person) is at the time owned by such Person and/or one or more Wholly-Owned Subsidiaries of such Person and (ii) any partnership, limited liability company, association, joint
venture or other entity in which such Person and/or one or more Wholly-Owned Subsidiaries of such Person has a 100% equity interest at such time.

We may sell debt securities offered by this prospectus in and/or outside the United States:

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through underwriters or dealers;

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through agents; or

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directly to purchasers.

We will describe in a prospectus supplement the particular terms of any offering of debt securities, including the following:

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the names of any underwriters or agents;

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the proceeds we will receive from the sale;

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any discounts or commissions and other items constituting underwriters or agents compensation;

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any discounts or concessions allowed or reallowed or paid to dealers; and

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any securities exchanges on which the applicable debt securities may be listed.

If we use underwriters in the sale, such underwriters will acquire the debt securities for their own account. The underwriters may resell
the debt securities in one or more transactions, at a fixed price or prices, which may be changed, or at market prices prevailing at the time of sale, at prices relating to prevailing market prices or at negotiated prices.

The debt securities may be offered to the public through underwriting syndicates represented by managing underwriters or by underwriters
without a syndicate. The obligations of the underwriters to purchase the debt securities will be subject to certain conditions. The underwriters will be obligated to purchase all the debt securities of the series offered if any of the debt
securities are purchased.

We may sell debt securities through agents or dealers designated by us. Any agent or dealer
involved in the offer or sale of the debt securities for which this prospectus is delivered will be named, and any commissions payable by us to that agent or dealer will be set forth, in the prospectus supplement. Unless indicated in the prospectus
supplement, the agents will agree to use their reasonable efforts to solicit purchases for the period of their appointment and any dealer will purchase debt securities from us as principal and may resell those debt securities at varying prices to be
determined by the dealer.

We also may sell debt securities directly. In this case, no underwriters or agents would be
involved.

Underwriters, dealers and agents that participate in the distribution of the debt securities may be deemed to be
underwriters within the meaning of the Securities Act, and any discounts, concessions, commissions or fees received by them from us and any profit on the resale of the debt securities sold by them may be deemed to be underwriting
discounts or commissions under the Securities Act.

We may have agreements with the underwriters, dealers and agents to
indemnify them against certain civil liabilities, including liabilities under the Securities Act, or to contribute with respect to payments which the underwriters, dealers or agents may be required to make, and to reimburse them for certain
expenses.

Underwriters, dealers and agents may engage in transactions with, or perform services for, us or our subsidiaries
in the ordinary course of their businesses.

In order to facilitate the offering of the debt securities, any underwriters or
agents, as the case may be, involved in the offering of such securities may engage in transactions that stabilize, maintain or otherwise affect the price of such securities or other securities the prices of which may be used to determine payments on
the

securities. Specifically, the underwriters or agents, as the case may be, may overallot in connection with the offering, creating a short position in such securities for their own account. In
addition, to cover overallotments or to stabilize the price of the securities or of such other securities, the underwriters or agents, as the case may be, may bid for, and purchase, such securities in the open market. Finally, in any offering of
such securities through a syndicate of underwriters, the underwriting syndicate may reclaim selling concessions allotted to an underwriter or a dealer for distributing such securities in the offering if the syndicate repurchases previously
distributed securities in transactions to cover syndicate short positions, in stabilization transactions or otherwise. Any of these activities may stabilize or maintain the market price of the debt securities above independent market levels. The
underwriters or agents, as the case may be, are not required to engage in these activities, and may end any of these activities at any time.

We may solicit offers to purchase debt securities directly from, and we may sell debt securities directly to, institutional investors or others. The terms of any of those sales, including the terms of any
bidding or auction process, if utilized, will be described in the applicable prospectus supplement.

Some or all of the debt
securities may be new issues of securities with no established trading market. We cannot and will not give any assurances as to the liquidity of the trading market for any of our debt securities.

LEGAL MATTERS

The validity of the debt securities and certain other matters will be passed upon for us by Sidley Austin LLP, Chicago, Illinois. Certain legal matters as to the guarantee given by Soltech, Inc. will be
passed upon by Stites & Harbison, PLLC, Louisville, Kentucky, and certain legal matters as to the guarantee given by CDC Corporation will be passed upon by Reinhart Boerner Van Deuren s.c., Milwaukee, Wisconsin.

EXPERTS

The financial statements and managements assessment of the effectiveness of internal control over financial reporting (which is included in Managements Report on Internal Control over
Financial Reporting) incorporated in this prospectus by reference to the Annual Report on Form 10-K of Owens Corning for the year ended December 31, 2011 have been so incorporated in reliance on the report of PricewaterhouseCoopers LLP, an
independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.